31423372 has 6 divisors (see below), whose sum is σ = 54990908. Its totient is φ = 15711684.

The previous prime is 31423369. The next prime is 31423373. The reversal of 31423372 is 27332413.

It is not an unprimeable number, because it can be changed into a prime (31423373) by changing a digit.

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 as a sum of consecutive naturals, namely, 3927918 + ... + 3927925.

Almost surely, 2^31423372 is an apocalyptic number.

It is an amenable number.

31423372 is a deficient number, since it is larger than the sum of its proper divisors (23567536).

31423372 is a wasteful number, since it uses less digits than its factorization.

31423372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7855847 (or 7855845 counting only the distinct ones).

The product of its digits is 3024, while the sum is 25.

The square root of 31423372 is about 5605.6553586534. The cubic root of 31423372 is about 315.5616819951.

Adding to 31423372 its reverse (27332413), we get a palindrome (58755785).

The spelling of 31423372 in words is "thirty-one million, four hundred twenty-three thousand, three hundred seventy-two".