31146916 has 12 divisors (see below), whose sum is σ = 54855388. Its totient is φ = 15473952.

The previous prime is 31146901. The next prime is 31146917. The reversal of 31146916 is 61964113.

It can be written as a sum of positive squares in 2 ways, for example, as 4665600 + 26481316 = 2160^2 + 5146^2 .

It is a super-2 number, since 2×31146916² = 1940260752622112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31146917) 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 3 ways as a sum of consecutive naturals, for example, 24171 + ... + 25426.

Almost surely, 2^31146916 is an apocalyptic number.

It is an amenable number.

31146916 is a deficient number, since it is larger than the sum of its proper divisors (23708472).

31146916 is a wasteful number, since it uses less digits than its factorization.

31146916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49758 (or 49756 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 31146916 is about 5580.9422143577. The cubic root of 31146916 is about 314.6335404138.

The spelling of 31146916 in words is "thirty-one million, one hundred forty-six thousand, nine hundred sixteen".