57471561 has 45 divisors (see below), whose sum is σ = 101932701. Its totient is φ = 31112424.

The previous prime is 57471541. The next prime is 57471571. The reversal of 57471561 is 16517475.

The square root of 57471561 is 7581.

It is a perfect power (a square), and thus also a powerful number.

57471561 is a `hidden beast` number, since 57 + 47 + 1 + 561 = 666.

It is not a de Polignac number, because 57471561 - 2⁵ = 57471529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (57471541) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 3024810 + ... + 3024828.

Almost surely, 2^57471561 is an apocalyptic number.

57471561 is the 7581-st square number.

57471561 is the 3791-st centered octagonal number.

It is an amenable number.

57471561 is a deficient number, since it is larger than the sum of its proper divisors (44461140).

57471561 is an frugal number, since it uses more digits than its factorization.

57471561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 29 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The cubic root of 57471561 is about 385.9084881545.

Multiplying 57471561 by its sum of digits (36), we get a square (2068976196 = 45486²).

The spelling of 57471561 in words is "fifty-seven million, four hundred seventy-one thousand, five hundred sixty-one".