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131102100431 = 197727892987
BaseRepresentation
bin111101000011001001…
…0110100101111001111
3110112101201201202012022
41322012102310233033
54121444114203211
6140121045000355
712320555316101
oct1720622645717
9415351652168
10131102100431
1150666799535
12214a99b30bb
13c49430c573
1464b99d3571
1536249b1bdb
hex1e864b4bcf

131102100431 has 8 divisors (see below), whose sum is σ = 138020225280. Its totient is φ = 124185777048.

The previous prime is 131102100397. The next prime is 131102100439. The reversal of 131102100431 is 134001201131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131102100431 - 210 = 131102099407 is a prime.

It is a super-4 number, since 4×1311021004314 (a number of 46 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131102100439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299681 + ... + 593306.

It is an arithmetic number, because the mean of its divisors is an integer number (17252528160).

Almost surely, 2131102100431 is an apocalyptic number.

131102100431 is a deficient number, since it is larger than the sum of its proper divisors (6918124849).

131102100431 is an equidigital number, since it uses as much as digits as its factorization.

131102100431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900733.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131102100431 its reverse (134001201131), we get a palindrome (265103301562).

The spelling of 131102100431 in words is "one hundred thirty-one billion, one hundred two million, one hundred thousand, four hundred thirty-one".

Divisors: 1 19 7727 146813 892987 16966753 6900110549 131102100431