13231015 has 32 divisors (see below), whose sum is σ = 19764864. Its totient is φ = 8294400.

The previous prime is 13230991. The next prime is 13231019. The reversal of 13231015 is 51013231.

It is not a de Polignac number, because 13231015 - 2⁵ = 13230983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13231015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13231019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21715 + ... + 22315.

It is an arithmetic number, because the mean of its divisors is an integer number (617652).

Almost surely, 2^13231015 is an apocalyptic number.

13231015 is a deficient number, since it is larger than the sum of its proper divisors (6533849).

13231015 is a wasteful number, since it uses less digits than its factorization.

13231015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 13231015 is about 3637.4462195337. The cubic root of 13231015 is about 236.5181031067.

Adding to 13231015 its reverse (51013231), we get a palindrome (64244246).

The spelling of 13231015 in words is "thirteen million, two hundred thirty-one thousand, fifteen".