31972075 has 12 divisors (see below), whose sum is σ = 39716208. Its totient is φ = 25532000.

The previous prime is 31972069. The next prime is 31972097. The reversal of 31972075 is 57027913.

It is not a de Polignac number, because 31972075 - 2¹⁵ = 31939307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31972075.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23925 + ... + 25225.

It is an arithmetic number, because the mean of its divisors is an integer number (3309684).

Almost surely, 2^31972075 is an apocalyptic number.

31972075 is a deficient number, since it is larger than the sum of its proper divisors (7744133).

31972075 is a wasteful number, since it uses less digits than its factorization.

31972075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294 (or 2289 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 31972075 is about 5654.3854661669. The cubic root of 31972075 is about 317.3878331540.

Adding to 31972075 its reverse (57027913), we get a palindrome (88999988).

The spelling of 31972075 in words is "thirty-one million, nine hundred seventy-two thousand, seventy-five".