57071331 has 8 divisors (see below), whose sum is σ = 84550160. Its totient is φ = 38047536.

The previous prime is 57071293. The next prime is 57071359. The reversal of 57071331 is 13317075.

It is a de Polignac number, because none of the positive numbers 2^k-57071331 is a prime.

It is a super-2 number, since 2×57071331² = 6514273644223122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 2113753 = 57071331 / (5 + 7 + 0 + 7 + 1 + 3 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57071295 and 57071304.

It is not an unprimeable number, because it can be changed into a prime (57078331) 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, 1056850 + ... + 1056903.

It is an arithmetic number, because the mean of its divisors is an integer number (10568770).

Almost surely, 2^57071331 is an apocalyptic number.

57071331 is a deficient number, since it is larger than the sum of its proper divisors (27478829).

57071331 is a wasteful number, since it uses less digits than its factorization.

57071331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2113762 (or 2113756 counting only the distinct ones).

The product of its (nonzero) digits is 2205, while the sum is 27.

The square root of 57071331 is about 7554.5569691412. The cubic root of 57071331 is about 385.0105827192.

The spelling of 57071331 in words is "fifty-seven million, seventy-one thousand, three hundred thirty-one".