57326521 has 6 divisors (see below), whose sum is σ = 66686010. Its totient is φ = 49136976.

The previous prime is 57326513. The next prime is 57326531. The reversal of 57326521 is 12562375.

It can be written as a sum of positive squares in only one way, i.e., 56836521 + 490000 = 7539^2 + 700^2 .

It is not a de Polignac number, because 57326521 - 2³ = 57326513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57326531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 584916 + ... + 585013.

It is an arithmetic number, because the mean of its divisors is an integer number (11114335).

Almost surely, 2^57326521 is an apocalyptic number.

It is an amenable number.

57326521 is a deficient number, since it is larger than the sum of its proper divisors (9359489).

57326521 is a wasteful number, since it uses less digits than its factorization.

57326521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169943 (or 1169936 counting only the distinct ones).

The product of its digits is 12600, while the sum is 31.

The square root of 57326521 is about 7571.4279366577. The cubic root of 57326521 is about 385.5835777837.

Adding to 57326521 its reverse (12562375), we get a palindrome (69888896).

The spelling of 57326521 in words is "fifty-seven million, three hundred twenty-six thousand, five hundred twenty-one".