31146245 has 16 divisors (see below), whose sum is σ = 41014512. Its totient is φ = 22563840.

The previous prime is 31146239. The next prime is 31146251. The reversal of 31146245 is 54264113.

It is an interprime number because it is at equal distance from previous prime (31146239) and next prime (31146251).

It can be written as a sum of positive squares in 8 ways, for example, as 1214404 + 29931841 = 1102^2 + 5471^2 .

It is not a de Polignac number, because 31146245 - 2⁴ = 31146229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1076 + ... + 7965.

It is an arithmetic number, because the mean of its divisors is an integer number (2563407).

Almost surely, 2^31146245 is an apocalyptic number.

It is an amenable number.

31146245 is a deficient number, since it is larger than the sum of its proper divisors (9868267).

31146245 is a wasteful number, since it uses less digits than its factorization.

31146245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9112.

The product of its digits is 2880, while the sum is 26.

The square root of 31146245 is about 5580.8820987367. The cubic root of 31146245 is about 314.6312810074.

The spelling of 31146245 in words is "thirty-one million, one hundred forty-six thousand, two hundred forty-five".