57523721 has 4 divisors (see below), whose sum is σ = 58382352. Its totient is φ = 56665092.

The previous prime is 57523681. The next prime is 57523727. The reversal of 57523721 is 12732575.

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 57523721 - 2⁶ = 57523657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57523727) 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, 429215 + ... + 429348.

It is an arithmetic number, because the mean of its divisors is an integer number (14595588).

Almost surely, 2^57523721 is an apocalyptic number.

It is an amenable number.

57523721 is a deficient number, since it is larger than the sum of its proper divisors (858631).

57523721 is an equidigital number, since it uses as much as digits as its factorization.

57523721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858630.

The product of its digits is 14700, while the sum is 32.

The square root of 57523721 is about 7584.4393991910. The cubic root of 57523721 is about 386.0252003736.

The spelling of 57523721 in words is "fifty-seven million, five hundred twenty-three thousand, seven hundred twenty-one".