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13131200220 = 2235419522323
BaseRepresentation
bin11000011101010111…
…00011011011011100
31020220010200002022220
430032223203123130
5203343041401340
610010555105340
7643255234365
oct141653433334
936803602286
1013131200220
115629247096
122665742250
13131361a878
148c7d5cb6c
1551cc1aed0
hex30eae36dc

13131200220 has 48 divisors (see below), whose sum is σ = 36855181440. Its totient is φ = 3493289536.

The previous prime is 13131200213. The next prime is 13131200237. The reversal of 13131200220 is 2200213131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 13131200220.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236022 + ... + 286301.

It is an arithmetic number, because the mean of its divisors is an integer number (767816280).

Almost surely, 213131200220 is an apocalyptic number.

13131200220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13131200220 is an abundant number, since it is smaller than the sum of its proper divisors (23723981220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13131200220 is a wasteful number, since it uses less digits than its factorization.

13131200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522754 (or 522752 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 13131200220 its reverse (2200213131), we get a palindrome (15331413351).

The spelling of 13131200220 in words is "thirteen billion, one hundred thirty-one million, two hundred thousand, two hundred twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 419 838 1257 1676 2095 2514 4190 5028 6285 8380 12570 25140 522323 1044646 1566969 2089292 2611615 3133938 5223230 6267876 7834845 10446460 15669690 31339380 218853337 437706674 656560011 875413348 1094266685 1313120022 2188533370 2626240044 3282800055 4377066740 6565600110 13131200220