31880057 has 4 divisors (see below), whose sum is σ = 34778256. Its totient is φ = 28981860.

The previous prime is 31880041. The next prime is 31880087. The reversal of 31880057 is 75008813.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31880057 - 2⁴ = 31880041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31880027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1449083 + ... + 1449104.

It is an arithmetic number, because the mean of its divisors is an integer number (8694564).

Almost surely, 2^31880057 is an apocalyptic number.

It is an amenable number.

31880057 is a deficient number, since it is larger than the sum of its proper divisors (2898199).

31880057 is a wasteful number, since it uses less digits than its factorization.

31880057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898198.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 31880057 is about 5646.2427330040. The cubic root of 31880057 is about 317.0830520083.

It can be divided in two parts, 31 and 880057, that added together give a palindrome (880088).

The spelling of 31880057 in words is "thirty-one million, eight hundred eighty thousand, fifty-seven".