31975961 has 8 divisors (see below), whose sum is σ = 33137280. Its totient is φ = 30833712.

The previous prime is 31975943. The next prime is 31975967. The reversal of 31975961 is 16957913.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31975961 - 2⁶ = 31975897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31975967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1310 + ... + 8103.

It is an arithmetic number, because the mean of its divisors is an integer number (4142160).

Almost surely, 2^31975961 is an apocalyptic number.

It is an amenable number.

31975961 is a deficient number, since it is larger than the sum of its proper divisors (1161319).

31975961 is an equidigital number, since it uses as much as digits as its factorization.

31975961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9535.

The product of its digits is 51030, while the sum is 41.

The square root of 31975961 is about 5654.7290828120. The cubic root of 31975961 is about 317.4006914493.

The spelling of 31975961 in words is "thirty-one million, nine hundred seventy-five thousand, nine hundred sixty-one".