57257081 has 8 divisors (see below), whose sum is σ = 66546240. Its totient is φ = 48245328.

The previous prime is 57257069. The next prime is 57257113. The reversal of 57257081 is 18075275.

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 57257081 - 2⁶ = 57257017 is a prime.

It is a super-2 number, since 2×57257081² = 6556746649281122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57257041) 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, 68906 + ... + 69731.

It is an arithmetic number, because the mean of its divisors is an integer number (8318280).

Almost surely, 2^57257081 is an apocalyptic number.

It is an amenable number.

57257081 is a deficient number, since it is larger than the sum of its proper divisors (9289159).

57257081 is a wasteful number, since it uses less digits than its factorization.

57257081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138703.

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 57257081 is about 7566.8408863937. The cubic root of 57257081 is about 385.4278282205.

The spelling of 57257081 in words is "fifty-seven million, two hundred fifty-seven thousand, eighty-one".