13251215231 has 4 divisors (see below), whose sum is σ = 13375058472. Its totient is φ = 13127371992.

The previous prime is 13251215209. The next prime is 13251215291.

13251215231 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13251215231 is a prime.

It is a super-2 number, since 2×13251215231² (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 13251215231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13251215291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61921460 + ... + 61921673.

It is an arithmetic number, because the mean of its divisors is an integer number (3343764618).

Almost surely, 2^13251215231 is an apocalyptic number.

13251215231 is a deficient number, since it is larger than the sum of its proper divisors (123843241).

13251215231 is a wasteful number, since it uses less digits than its factorization.

13251215231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123843240.

The product of its digits is 1800, while the sum is 26.

The spelling of 13251215231 in words is "thirteen billion, two hundred fifty-one million, two hundred fifteen thousand, two hundred thirty-one".