57280057 has 4 divisors (see below), whose sum is σ = 57295440. Its totient is φ = 57264676.

The previous prime is 57280007. The next prime is 57280061. The reversal of 57280057 is 75008275.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 57280057 - 2²³ = 48891449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57280007) 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, 1794 + ... + 10852.

It is an arithmetic number, because the mean of its divisors is an integer number (14323860).

Almost surely, 2^57280057 is an apocalyptic number.

It is an amenable number.

57280057 is a deficient number, since it is larger than the sum of its proper divisors (15383).

57280057 is an equidigital number, since it uses as much as digits as its factorization.

57280057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15382.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 57280057 is about 7568.3589370484. The cubic root of 57280057 is about 385.4793758799.

The spelling of 57280057 in words is "fifty-seven million, two hundred eighty thousand, fifty-seven".