31961144 has 16 divisors (see below), whose sum is σ = 60822600. Its totient is φ = 15741792.

The previous prime is 31961143. The next prime is 31961213. The reversal of 31961144 is 44116913.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31961143) by changing a digit.

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, 29279 + ... + 30350.

Almost surely, 2^31961144 is an apocalyptic number.

It is an amenable number.

31961144 is a deficient number, since it is larger than the sum of its proper divisors (28861456).

31961144 is a wasteful number, since it uses less digits than its factorization.

31961144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59702 (or 59698 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 31961144 is about 5653.4187886623. The cubic root of 31961144 is about 317.3516582329.

The spelling of 31961144 in words is "thirty-one million, nine hundred sixty-one thousand, one hundred forty-four".