31261113 has 64 divisors (see below), whose sum is σ = 54835200. Its totient is φ = 17521920.

The previous prime is 31261093. The next prime is 31261121. The reversal of 31261113 is 31116213.

It is not a de Polignac number, because 31261113 - 2⁵ = 31261081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31261123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1008408 + ... + 1008438.

It is an arithmetic number, because the mean of its divisors is an integer number (856800).

Almost surely, 2^31261113 is an apocalyptic number.

It is an amenable number.

31261113 is a deficient number, since it is larger than the sum of its proper divisors (23574087).

31261113 is a wasteful number, since it uses less digits than its factorization.

31261113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 64 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 31261113 is about 5591.1638323340. The cubic root of 31261113 is about 315.0175953890.

Adding to 31261113 its reverse (31116213), we get a palindrome (62377326).

It can be divided in two parts, 312 and 61113, that added together give a triangular number (61425 = T₃₅₀).

The spelling of 31261113 in words is "thirty-one million, two hundred sixty-one thousand, one hundred thirteen".