57057811 has 8 divisors (see below), whose sum is σ = 59261760. Its totient is φ = 54888768.

The previous prime is 57057787. The next prime is 57057851. The reversal of 57057811 is 11875075.

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

It is a cyclic number.

It is not a de Polignac number, because 57057811 - 2¹⁵ = 57025043 is a prime.

It is a super-2 number, since 2×57057811² = 6511187592223442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57057851) 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, 5371 + ... + 11956.

It is an arithmetic number, because the mean of its divisors is an integer number (7407720).

Almost surely, 2^57057811 is an apocalyptic number.

57057811 is a deficient number, since it is larger than the sum of its proper divisors (2203949).

57057811 is a wasteful number, since it uses less digits than its factorization.

57057811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17453.

The product of its (nonzero) digits is 9800, while the sum is 34.

The square root of 57057811 is about 7553.6620919922. The cubic root of 57057811 is about 384.9801777617.

The spelling of 57057811 in words is "fifty-seven million, fifty-seven thousand, eight hundred eleven".