31941057 has 4 divisors (see below), whose sum is σ = 42588080. Its totient is φ = 21294036.

The previous prime is 31941047. The next prime is 31941073. The reversal of 31941057 is 75014913.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75014913 = 3 ⋅25004971.

It is not a de Polignac number, because 31941057 - 2⁷ = 31940929 is a prime.

It is a super-2 number, since 2×31941057² = 2040462244554498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31941017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5323507 + ... + 5323512.

It is an arithmetic number, because the mean of its divisors is an integer number (10647020).

Almost surely, 2^31941057 is an apocalyptic number.

It is an amenable number.

31941057 is a deficient number, since it is larger than the sum of its proper divisors (10647023).

31941057 is a wasteful number, since it uses less digits than its factorization.

31941057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10647022.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 31941057 is about 5651.6419737984. The cubic root of 31941057 is about 317.2851610442.

The spelling of 31941057 in words is "thirty-one million, nine hundred forty-one thousand, fifty-seven".