57716021 has 4 divisors (see below), whose sum is σ = 62962944. Its totient is φ = 52469100.

The previous prime is 57715991. The next prime is 57716023. The reversal of 57716021 is 12061775.

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.

It is a cyclic number.

It is not a de Polignac number, because 57716021 - 2¹⁰ = 57714997 is a prime.

It is a super-2 number, since 2×57716021² = 6662278160144882, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57716023) 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, 2623445 + ... + 2623466.

It is an arithmetic number, because the mean of its divisors is an integer number (15740736).

Almost surely, 2^57716021 is an apocalyptic number.

It is an amenable number.

57716021 is a deficient number, since it is larger than the sum of its proper divisors (5246923).

57716021 is a wasteful number, since it uses less digits than its factorization.

57716021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5246922.

The product of its (nonzero) digits is 2940, while the sum is 29.

The square root of 57716021 is about 7597.1060937702. The cubic root of 57716021 is about 386.4548786517.

Adding to 57716021 its reverse (12061775), we get a palindrome (69777796).

The spelling of 57716021 in words is "fifty-seven million, seven hundred sixteen thousand, twenty-one".