31996975 has 24 divisors (see below), whose sum is σ = 42586560. Its totient is φ = 23761920.

The previous prime is 31996973. The next prime is 31997023. The reversal of 31996975 is 57969913.

It is not a de Polignac number, because 31996975 - 2¹ = 31996973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31996973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33099 + ... + 34051.

It is an arithmetic number, because the mean of its divisors is an integer number (1774440).

Almost surely, 2^31996975 is an apocalyptic number.

31996975 is a deficient number, since it is larger than the sum of its proper divisors (10589585).

31996975 is a wasteful number, since it uses less digits than its factorization.

31996975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1054 counting only the distinct ones).

The product of its digits is 459270, while the sum is 49.

The square root of 31996975 is about 5656.5868684216. The cubic root of 31996975 is about 317.4702061447.

The spelling of 31996975 in words is "thirty-one million, nine hundred ninety-six thousand, nine hundred seventy-five".