57471021 has 12 divisors (see below), whose sum is σ = 84183840. Its totient is φ = 37773960.

The previous prime is 57471019. The next prime is 57471031. The reversal of 57471021 is 12017475.

57471021 is a `hidden beast` number, since 574 + 71 + 0 + 21 = 666.

It is not a de Polignac number, because 57471021 - 2¹ = 57471019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57471031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44331 + ... + 45608.

It is an arithmetic number, because the mean of its divisors is an integer number (7015320).

Almost surely, 2^57471021 is an apocalyptic number.

It is an amenable number.

57471021 is a deficient number, since it is larger than the sum of its proper divisors (26712819).

57471021 is a wasteful number, since it uses less digits than its factorization.

57471021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90016 (or 90013 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 57471021 is about 7580.9643845622. The cubic root of 57471021 is about 385.9072794915.

Adding to 57471021 its reverse (12017475), we get a palindrome (69488496).

The spelling of 57471021 in words is "fifty-seven million, four hundred seventy-one thousand, twenty-one".