31325025 has 48 divisors (see below), whose sum is σ = 54246528. Its totient is φ = 15936000.

The previous prime is 31324991. The next prime is 31325071. The reversal of 31325025 is 52052313.

It is not a de Polignac number, because 31325025 - 2¹⁰ = 31324001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31324992 and 31325010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187492 + ... + 187658.

It is an arithmetic number, because the mean of its divisors is an integer number (1130136).

Almost surely, 2^31325025 is an apocalyptic number.

It is an amenable number.

31325025 is a deficient number, since it is larger than the sum of its proper divisors (22921503).

31325025 is a wasteful number, since it uses less digits than its factorization.

31325025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 31325025 is about 5596.8763609714. The cubic root of 31325025 is about 315.2321292253.

Adding to 31325025 its reverse (52052313), we get a palindrome (83377338).

The spelling of 31325025 in words is "thirty-one million, three hundred twenty-five thousand, twenty-five".