31423552 has 14 divisors (see below), whose sum is σ = 62356238. Its totient is φ = 15711744.

The previous prime is 31423529. The next prime is 31423573. The reversal of 31423552 is 25532413.

It can be written as a sum of positive squares in only one way, i.e., 31091776 + 331776 = 5576^2 + 576^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245433 + ... + 245560.

It is an arithmetic number, because the mean of its divisors is an integer number (4454017).

Almost surely, 2^31423552 is an apocalyptic number.

31423552 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31423552 is a deficient number, since it is larger than the sum of its proper divisors (30932686).

31423552 is an equidigital number, since it uses as much as digits as its factorization.

31423552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491005 (or 490995 counting only the distinct ones).

The product of its digits is 3600, while the sum is 25.

The square root of 31423552 is about 5605.6714138451. The cubic root of 31423552 is about 315.5622845296.

Adding to 31423552 its reverse (25532413), we get a palindrome (56955965).

The spelling of 31423552 in words is "thirty-one million, four hundred twenty-three thousand, five hundred fifty-two".