31142144 has 36 divisors (see below), whose sum is σ = 67819920. Its totient is φ = 14154240.

The previous prime is 31142129. The next prime is 31142179. The reversal of 31142144 is 44124113.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2714 + ... + 8345.

Almost surely, 2^31142144 is an apocalyptic number.

It is an amenable number.

31142144 is an abundant number, since it is smaller than the sum of its proper divisors (36677776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31142144 is a wasteful number, since it uses less digits than its factorization.

31142144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11086 (or 11072 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 31142144 is about 5580.5146716051. The cubic root of 31142144 is about 314.6174713222.

Adding to 31142144 its reverse (44124113), we get a palindrome (75266257).

The spelling of 31142144 in words is "thirty-one million, one hundred forty-two thousand, one hundred forty-four".