31166125 has 8 divisors (see below), whose sum is σ = 38895480. Its totient is φ = 24932800.

The previous prime is 31166119. The next prime is 31166131. The reversal of 31166125 is 52166113.

It is an interprime number because it is at equal distance from previous prime (31166119) and next prime (31166131).

It can be written as a sum of positive squares in 4 ways, for example, as 662596 + 30503529 = 814^2 + 5523^2 .

It is a de Polignac number, because none of the positive numbers 2^k-31166125 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 31166125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124540 + ... + 124789.

It is an arithmetic number, because the mean of its divisors is an integer number (4861935).

Almost surely, 2^31166125 is an apocalyptic number.

It is an amenable number.

31166125 is a deficient number, since it is larger than the sum of its proper divisors (7729355).

31166125 is an equidigital number, since it uses as much as digits as its factorization.

31166125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249344 (or 249334 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 31166125 is about 5582.6628950708. The cubic root of 31166125 is about 314.6982076365.

The spelling of 31166125 in words is "thirty-one million, one hundred sixty-six thousand, one hundred twenty-five".