31242044 has 6 divisors (see below), whose sum is σ = 54673584. Its totient is φ = 15621020.

The previous prime is 31242007. The next prime is 31242049. The reversal of 31242044 is 44024213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31242049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3905252 + ... + 3905259.

It is an arithmetic number, because the mean of its divisors is an integer number (9112264).

Almost surely, 2^31242044 is an apocalyptic number.

It is an amenable number.

31242044 is a deficient number, since it is larger than the sum of its proper divisors (23431540).

31242044 is a wasteful number, since it uses less digits than its factorization.

31242044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7810515 (or 7810513 counting only the distinct ones).

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

The square root of 31242044 is about 5589.4582921782. The cubic root of 31242044 is about 314.9535297199.

Adding to 31242044 its reverse (44024213), we get a palindrome (75266257).

The spelling of 31242044 in words is "thirty-one million, two hundred forty-two thousand, forty-four".