31142044 has 12 divisors (see below), whose sum is σ = 55061104. Its totient is φ = 15410304.

The previous prime is 31142039. The next prime is 31142077. The reversal of 31142044 is 44024113.

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 3 ways as a sum of consecutive naturals, for example, 39744 + ... + 40519.

Almost surely, 2^31142044 is an apocalyptic number.

It is an amenable number.

31142044 is a deficient number, since it is larger than the sum of its proper divisors (23919060).

31142044 is a wasteful number, since it uses less digits than its factorization.

31142044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80364 (or 80362 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 31142044 is about 5580.5057118509. The cubic root of 31142044 is about 314.6171345676.

Adding to 31142044 its reverse (44024113), we get a palindrome (75166157).

The spelling of 31142044 in words is "thirty-one million, one hundred forty-two thousand, forty-four".