31225372 has 6 divisors (see below), whose sum is σ = 54644408. Its totient is φ = 15612684.

The previous prime is 31225361. The next prime is 31225391. The reversal of 31225372 is 27352213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3903168 + ... + 3903175.

Almost surely, 2^31225372 is an apocalyptic number.

It is an amenable number.

31225372 is a deficient number, since it is larger than the sum of its proper divisors (23419036).

31225372 is a wasteful number, since it uses less digits than its factorization.

31225372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7806347 (or 7806345 counting only the distinct ones).

The product of its digits is 2520, while the sum is 25.

The square root of 31225372 is about 5587.9667142888. The cubic root of 31225372 is about 314.8974958322.

Adding to 31225372 its reverse (27352213), we get a palindrome (58577585).

It can be divided in two parts, 3 and 1225372, that multiplied together give a triangular number (3676116 = T₂₇₁₁).

The spelling of 31225372 in words is "thirty-one million, two hundred twenty-five thousand, three hundred seventy-two".