31263442 has 24 divisors (see below), whose sum is σ = 56939904. Its totient is φ = 12608832.

The previous prime is 31263433. The next prime is 31263457. The reversal of 31263442 is 24436213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183 + ... + 7909.

It is an arithmetic number, because the mean of its divisors is an integer number (2372496).

Almost surely, 2^31263442 is an apocalyptic number.

31263442 is a deficient number, since it is larger than the sum of its proper divisors (25676462).

31263442 is a wasteful number, since it uses less digits than its factorization.

31263442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7770 (or 7753 counting only the distinct ones).

The product of its digits is 3456, while the sum is 25.

The square root of 31263442 is about 5591.3721035181. The cubic root of 31263442 is about 315.0254182898.

Adding to 31263442 its reverse (24436213), we get a palindrome (55699655).

The spelling of 31263442 in words is "thirty-one million, two hundred sixty-three thousand, four hundred forty-two".