31550125 has 8 divisors (see below), whose sum is σ = 39374712. Its totient is φ = 25240000.

The previous prime is 31550119. The next prime is 31550131. The reversal of 31550125 is 52105513.

It is an interprime number because it is at equal distance from previous prime (31550119) and next prime (31550131).

It can be written as a sum of positive squares in 4 ways, for example, as 212521 + 31337604 = 461^2 + 5598^2 .

It is not a de Polignac number, because 31550125 - 2⁵ = 31550093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31550096 and 31550105.

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, 126076 + ... + 126325.

It is an arithmetic number, because the mean of its divisors is an integer number (4921839).

Almost surely, 2^31550125 is an apocalyptic number.

It is an amenable number.

31550125 is a deficient number, since it is larger than the sum of its proper divisors (7824587).

31550125 is an equidigital number, since it uses as much as digits as its factorization.

31550125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252416 (or 252406 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 31550125 is about 5616.9497950400. The cubic root of 31550125 is about 315.9854083152.

Adding to 31550125 its reverse (52105513), we get a palindrome (83655638).

The spelling of 31550125 in words is "thirty-one million, five hundred fifty thousand, one hundred twenty-five".