57109331 has 4 divisors (see below), whose sum is σ = 57198792. Its totient is φ = 57019872.

The previous prime is 57109321. The next prime is 57109333. The reversal of 57109331 is 13390175.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57109331 - 2⁶ = 57109267 is a prime.

It is a super-2 number, since 2×57109331² = 6522951374535122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57109294 and 57109303.

It is not an unprimeable number, because it can be changed into a prime (57109333) 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, 43766 + ... + 45051.

It is an arithmetic number, because the mean of its divisors is an integer number (14299698).

Almost surely, 2^57109331 is an apocalyptic number.

57109331 is a deficient number, since it is larger than the sum of its proper divisors (89461).

57109331 is an equidigital number, since it uses as much as digits as its factorization.

57109331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89460.

The product of its (nonzero) digits is 2835, while the sum is 29.

The square root of 57109331 is about 7557.0715889159. The cubic root of 57109331 is about 385.0960147329.

The spelling of 57109331 in words is "fifty-seven million, one hundred nine thousand, three hundred thirty-one".