31000442 has 24 divisors (see below), whose sum is σ = 52098228. Its totient is φ = 13819520.

The previous prime is 31000439. The next prime is 31000471. The reversal of 31000442 is 24400013.

It can be written as a sum of positive squares in 2 ways, for example, as 25715041 + 5285401 = 5071^2 + 2299^2 .

It is a super-2 number, since 2×31000442² = 1922054808390728, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11618 + ... + 14034.

Almost surely, 2^31000442 is an apocalyptic number.

31000442 is a deficient number, since it is larger than the sum of its proper divisors (21097786).

31000442 is a wasteful number, since it uses less digits than its factorization.

31000442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2494 (or 2483 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 31000442 is about 5567.8040554603. The cubic root of 31000442 is about 314.1395582323.

Adding to 31000442 its reverse (24400013), we get a palindrome (55400455).

The spelling of 31000442 in words is "thirty-one million, four hundred forty-two", and thus it is an aban number.