31042893 has 16 divisors (see below), whose sum is σ = 49360896. Its totient is φ = 16967280.

The previous prime is 31042877. The next prime is 31042897. The reversal of 31042893 is 39824013.

It is not a de Polignac number, because 31042893 - 2⁴ = 31042877 is a prime.

It is a super-2 number, since 2×31042893² = 1927322411618898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31042893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31042897) 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, 31653 + ... + 32618.

It is an arithmetic number, because the mean of its divisors is an integer number (3085056).

Almost surely, 2^31042893 is an apocalyptic number.

It is an amenable number.

31042893 is a deficient number, since it is larger than the sum of its proper divisors (18318003).

31042893 is a wasteful number, since it uses less digits than its factorization.

31042893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64304.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 31042893 is about 5571.6149364435. The cubic root of 31042893 is about 314.2828836719.

The spelling of 31042893 in words is "thirty-one million, forty-two thousand, eight hundred ninety-three".