12529430731 has 16 divisors (see below), whose sum is σ = 13055511040. Its totient is φ = 12013803360.

The previous prime is 12529430713. The next prime is 12529430761. The reversal of 12529430731 is 13703492521.

It is a cyclic number.

It is not a de Polignac number, because 12529430731 - 2²¹ = 12527333579 is a prime.

It is a super-2 number, since 2×12529430731² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12529430761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1665280 + ... + 1672786.

It is an arithmetic number, because the mean of its divisors is an integer number (815969440).

Almost surely, 2^12529430731 is an apocalyptic number.

12529430731 is a deficient number, since it is larger than the sum of its proper divisors (526080309).

12529430731 is an equidigital number, since it uses as much as digits as its factorization.

12529430731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8194.

The product of its (nonzero) digits is 45360, while the sum is 37.

It can be divided in two parts, 125294 and 30731, that added together give a square (156025 = 395²).

The spelling of 12529430731 in words is "twelve billion, five hundred twenty-nine million, four hundred thirty thousand, seven hundred thirty-one".