31913485 has 16 divisors (see below), whose sum is σ = 40042800. Its totient is φ = 24385536.

The previous prime is 31913459. The next prime is 31913491. The reversal of 31913485 is 58431913.

It can be written as a sum of positive squares in 8 ways, for example, as 4235364 + 27678121 = 2058^2 + 5261^2 .

It is a cyclic number.

It is not a de Polignac number, because 31913485 - 2¹¹ = 31911437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31913485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12931 + ... + 15199.

It is an arithmetic number, because the mean of its divisors is an integer number (2502675).

Almost surely, 2^31913485 is an apocalyptic number.

It is an amenable number.

31913485 is a deficient number, since it is larger than the sum of its proper divisors (8129315).

31913485 is a wasteful number, since it uses less digits than its factorization.

31913485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400.

The product of its digits is 12960, while the sum is 34.

The square root of 31913485 is about 5649.2021560571. The cubic root of 31913485 is about 317.1938396575.

The spelling of 31913485 in words is "thirty-one million, nine hundred thirteen thousand, four hundred eighty-five".