31125025 has 6 divisors (see below), whose sum is σ = 38595062. Its totient is φ = 24900000.

The previous prime is 31125007. The next prime is 31125047. The reversal of 31125025 is 52052113.

It can be written as a sum of positive squares in 3 ways, for example, as 77841 + 31047184 = 279^2 + 5572^2 .

It is not a de Polignac number, because 31125025 - 2⁷ = 31124897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31124993 and 31125011.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 622476 + ... + 622525.

Almost surely, 2^31125025 is an apocalyptic number.

It is an amenable number.

31125025 is a deficient number, since it is larger than the sum of its proper divisors (7470037).

31125025 is a wasteful number, since it uses less digits than its factorization.

31125025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245011 (or 1245006 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 31125025 is about 5578.9806416585. The cubic root of 31125025 is about 314.5598117973.

Adding to 31125025 its reverse (52052113), we get a palindrome (83177138).

The spelling of 31125025 in words is "thirty-one million, one hundred twenty-five thousand, twenty-five".