31880545 has 8 divisors (see below), whose sum is σ = 38295720. Its totient is φ = 25478400.

The previous prime is 31880533. The next prime is 31880567. The reversal of 31880545 is 54508813.

It can be written as a sum of positive squares in 4 ways, for example, as 5161984 + 26718561 = 2272^2 + 5169^2 .

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

It is not a de Polignac number, because 31880545 - 2⁷ = 31880417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31880545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3351 + ... + 8659.

It is an arithmetic number, because the mean of its divisors is an integer number (4786965).

Almost surely, 2^31880545 is an apocalyptic number.

It is an amenable number.

31880545 is a deficient number, since it is larger than the sum of its proper divisors (6415175).

31880545 is a wasteful number, since it uses less digits than its factorization.

31880545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6515.

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 31880545 is about 5646.2859474171. The cubic root of 31880545 is about 317.0846699031.

The spelling of 31880545 in words is "thirty-one million, eight hundred eighty thousand, five hundred forty-five".