3131625 has 32 divisors (see below), whose sum is σ = 5960448. Its totient is φ = 1430400.

The previous prime is 3131603. The next prime is 3131629. The reversal of 3131625 is 5261313.

It is not a de Polignac number, because 3131625 - 2⁵ = 3131593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (3131629) 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 31 ways as a sum of consecutive naturals, for example, 2029 + ... + 3221.

It is an arithmetic number, because the mean of its divisors is an integer number (186264).

Almost surely, 2^3131625 is an apocalyptic number.

3131625 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3131625 is a deficient number, since it is larger than the sum of its proper divisors (2828823).

3131625 is a wasteful number, since it uses less digits than its factorization.

3131625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218 (or 1208 counting only the distinct ones).

The product of its digits is 540, while the sum is 21.

The square root of 3131625 is about 1769.6397938564. The cubic root of 3131625 is about 146.3041292805.

Adding to 3131625 its reverse (5261313), we get a palindrome (8392938).

The spelling of 3131625 in words is "three million, one hundred thirty-one thousand, six hundred twenty-five".