31315044 has 12 divisors (see below), whose sum is σ = 73068464. Its totient is φ = 10438344.

The previous prime is 31315013. The next prime is 31315069. The reversal of 31315044 is 44051313.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 31315044.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1304782 + ... + 1304805.

Almost surely, 2^31315044 is an apocalyptic number.

It is an amenable number.

31315044 is an abundant number, since it is smaller than the sum of its proper divisors (41753420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31315044 is a wasteful number, since it uses less digits than its factorization.

31315044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609594 (or 2609592 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 31315044 is about 5595.9846318588. The cubic root of 31315044 is about 315.1986451753.

Adding to 31315044 its reverse (44051313), we get a palindrome (75366357).

The spelling of 31315044 in words is "thirty-one million, three hundred fifteen thousand, forty-four".