31245472 has 24 divisors (see below), whose sum is σ = 61660116. Its totient is φ = 15585792.

The previous prime is 31245469. The next prime is 31245479. The reversal of 31245472 is 27454213.

It can be written as a sum of positive squares in 2 ways, for example, as 22695696 + 8549776 = 4764^2 + 2924^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 31245472.

It is not an unprimeable number, because it can be changed into a prime (31245479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16948 + ... + 18700.

Almost surely, 2^31245472 is an apocalyptic number.

31245472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31245472 is a deficient number, since it is larger than the sum of its proper divisors (30414644).

31245472 is a wasteful number, since it uses less digits than its factorization.

31245472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2320 (or 2312 counting only the distinct ones).

The product of its digits is 6720, while the sum is 28.

The square root of 31245472 is about 5589.7649324457. The cubic root of 31245472 is about 314.9650486122.

Adding to 31245472 its reverse (27454213), we get a palindrome (58699685).

The spelling of 31245472 in words is "thirty-one million, two hundred forty-five thousand, four hundred seventy-two".