57421555 has 16 divisors (see below), whose sum is σ = 70788960. Its totient is φ = 44690688.

The previous prime is 57421543. The next prime is 57421577. The reversal of 57421555 is 55512475.

It is a cyclic number.

It is not a de Polignac number, because 57421555 - 2¹⁷ = 57290483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57421555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87609 + ... + 88261.

It is an arithmetic number, because the mean of its divisors is an integer number (4424310).

Almost surely, 2^57421555 is an apocalyptic number.

57421555 is a deficient number, since it is larger than the sum of its proper divisors (13367405).

57421555 is a wasteful number, since it uses less digits than its factorization.

57421555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110.

The product of its digits is 35000, while the sum is 34.

The square root of 57421555 is about 7577.7011685603. The cubic root of 57421555 is about 385.7965293629.

The spelling of 57421555 in words is "fifty-seven million, four hundred twenty-one thousand, five hundred fifty-five".