57563621 has 4 divisors (see below), whose sum is σ = 59420544. Its totient is φ = 55706700.

The previous prime is 57563609. The next prime is 57563629. The reversal of 57563621 is 12636575.

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 57563621 - 2⁶ = 57563557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57563629) 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, 928415 + ... + 928476.

It is an arithmetic number, because the mean of its divisors is an integer number (14855136).

Almost surely, 2^57563621 is an apocalyptic number.

It is an amenable number.

57563621 is a deficient number, since it is larger than the sum of its proper divisors (1856923).

57563621 is a wasteful number, since it uses less digits than its factorization.

57563621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856922.

The product of its digits is 37800, while the sum is 35.

The square root of 57563621 is about 7587.0693287988. The cubic root of 57563621 is about 386.1144322326.

The spelling of 57563621 in words is "fifty-seven million, five hundred sixty-three thousand, six hundred twenty-one".