31244042 has 4 divisors (see below), whose sum is σ = 46866066. Its totient is φ = 15622020.

The previous prime is 31243967. The next prime is 31244077. The reversal of 31244042 is 24044213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24044213 = 47 ⋅511579.

It can be written as a sum of positive squares in only one way, i.e., 24216241 + 7027801 = 4921^2 + 2651^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7811009 + ... + 7811012.

Almost surely, 2^31244042 is an apocalyptic number.

31244042 is a deficient number, since it is larger than the sum of its proper divisors (15622024).

31244042 is a wasteful number, since it uses less digits than its factorization.

31244042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15622023.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 31244042 is about 5589.6370186265. The cubic root of 31244042 is about 314.9602435758.

Adding to 31244042 its reverse (24044213), we get a palindrome (55288255).

The spelling of 31244042 in words is "thirty-one million, two hundred forty-four thousand, forty-two".