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13531203012 = 2235827193513
BaseRepresentation
bin11001001101000010…
…11100010111000100
31021221000100100000010
430212201130113010
5210202441444022
610114404350220
7656213220315
oct144641342704
937830310003
1013531203012
115814014108
1227576a5370
131378460502
1492512460c
15542dd050c
hex32685c5c4

13531203012 has 24 divisors (see below), whose sum is σ = 31578388576. Its totient is φ = 4509603648.

The previous prime is 13531202969. The next prime is 13531203013. The reversal of 13531203012 is 21030213531.

It is a self number, because there is not a number n which added to its sum of digits gives 13531203012.

It is not an unprimeable number, because it can be changed into a prime (13531203013) 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, 26833 + ... + 166680.

Almost surely, 213531203012 is an apocalyptic number.

13531203012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13531203012 is an abundant number, since it is smaller than the sum of its proper divisors (18047185564).

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

13531203012 is a wasteful number, since it uses less digits than its factorization.

13531203012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199347 (or 199345 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

Adding to 13531203012 its reverse (21030213531), we get a palindrome (34561416543).

The spelling of 13531203012 in words is "thirteen billion, five hundred thirty-one million, two hundred three thousand, twelve".

Divisors: 1 2 3 4 6 12 5827 11654 17481 23308 34962 69924 193513 387026 580539 774052 1161078 2322156 1127600251 2255200502 3382800753 4510401004 6765601506 13531203012