31425388 has 12 divisors (see below), whose sum is σ = 55428352. Its totient is φ = 15588720.

The previous prime is 31425371. The next prime is 31425391. The reversal of 31425388 is 88352413.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30423 + ... + 31438.

Almost surely, 2^31425388 is an apocalyptic number.

It is an amenable number.

31425388 is a deficient number, since it is larger than the sum of its proper divisors (24002964).

31425388 is a wasteful number, since it uses less digits than its factorization.

31425388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61992 (or 61990 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 31425388 is about 5605.8351741734. The cubic root of 31425388 is about 315.5684302498.

Subtracting 31425388 from its reverse (88352413), we obtain a square (56927025 = 7545²).

It can be divided in two parts, 31425 and 388, that added together give a palindrome (31813).

The spelling of 31425388 in words is "thirty-one million, four hundred twenty-five thousand, three hundred eighty-eight".