31532961 has 8 divisors (see below), whose sum is σ = 42081984. Its totient is φ = 21002960.

The previous prime is 31532959. The next prime is 31532971. The reversal of 31532961 is 16923513.

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 31532961 - 2¹ = 31532959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31532971) 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, 285 + ... + 7946.

It is an arithmetic number, because the mean of its divisors is an integer number (5260248).

Almost surely, 2^31532961 is an apocalyptic number.

It is an amenable number.

31532961 is a deficient number, since it is larger than the sum of its proper divisors (10549023).

31532961 is a wasteful number, since it uses less digits than its factorization.

31532961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9511.

The product of its digits is 4860, while the sum is 30.

The square root of 31532961 is about 5615.4217116794. The cubic root of 31532961 is about 315.9280967899.

The spelling of 31532961 in words is "thirty-one million, five hundred thirty-two thousand, nine hundred sixty-one".