13231210729 has 9 divisors (see below), whose sum is σ = 14544787831. Its totient is φ = 12027223120.

The previous prime is 13231210711. The next prime is 13231210739. The reversal of 13231210729 is 92701213231.

The square root of 13231210729 is 115027.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11967266025 + 1263944704 = 109395^2 + 35552^2 .

It is not a de Polignac number, because 13231210729 - 2¹⁷ = 13231079657 is a prime.

It is a super-2 number, since 2×13231210729² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13231210729.

It is not an unprimeable number, because it can be changed into a prime (13231210739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1260069 + ... + 1270525.

Almost surely, 2^13231210729 is an apocalyptic number.

13231210729 is the 115027-th square number.

13231210729 is the 57514-th centered octagonal number.

It is an amenable number.

13231210729 is a deficient number, since it is larger than the sum of its proper divisors (1313577102).

13231210729 is an frugal number, since it uses more digits than its factorization.

13231210729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20936 (or 10468 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 31.

The spelling of 13231210729 in words is "thirteen billion, two hundred thirty-one million, two hundred ten thousand, seven hundred twenty-nine".