31465013 has 4 divisors (see below), whose sum is σ = 31691520. Its totient is φ = 31238508.

The previous prime is 31465003. The next prime is 31465033. The reversal of 31465013 is 31056413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31056413 = 2939 ⋅10567.

It is a cyclic number.

It is not a de Polignac number, because 31465013 - 2⁸ = 31464757 is a prime.

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 31465013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31465003) 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, 113045 + ... + 113322.

It is an arithmetic number, because the mean of its divisors is an integer number (7922880).

Almost surely, 2^31465013 is an apocalyptic number.

It is an amenable number.

31465013 is a deficient number, since it is larger than the sum of its proper divisors (226507).

31465013 is a wasteful number, since it uses less digits than its factorization.

31465013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226506.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 31465013 is about 5609.3683245086. The cubic root of 31465013 is about 315.7010103899.

The spelling of 31465013 in words is "thirty-one million, four hundred sixty-five thousand, thirteen".