31265013 has 16 divisors (see below), whose sum is σ = 47257280. Its totient is φ = 18226944.

The previous prime is 31264993. The next prime is 31265029. The reversal of 31265013 is 31056213.

It is not a de Polignac number, because 31265013 - 2⁶ = 31264949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31265033) 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, 20356 + ... + 21837.

It is an arithmetic number, because the mean of its divisors is an integer number (2953580).

Almost surely, 2^31265013 is an apocalyptic number.

It is an amenable number.

31265013 is a deficient number, since it is larger than the sum of its proper divisors (15992267).

31265013 is a wasteful number, since it uses less digits than its factorization.

31265013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42228.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 31265013 is about 5591.5125860540. The cubic root of 31265013 is about 315.0306949177.

The spelling of 31265013 in words is "thirty-one million, two hundred sixty-five thousand, thirteen".