57221358 has 8 divisors (see below), whose sum is σ = 114442728. Its totient is φ = 19073784.

The previous prime is 57221357. The next prime is 57221377. The reversal of 57221358 is 85312275.

57221358 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

57221358 is an admirable number.

It is a super-2 number, since 2×57221358² = 6548567622728328, 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 (57221357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4768441 + ... + 4768452.

It is an arithmetic number, because the mean of its divisors is an integer number (14305341).

Almost surely, 2^57221358 is an apocalyptic number.

57221358 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57221358 is a wasteful number, since it uses less digits than its factorization.

57221358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9536898.

The product of its digits is 16800, while the sum is 33.

The square root of 57221358 is about 7564.4800217860. The cubic root of 57221358 is about 385.3476547148.

The spelling of 57221358 in words is "fifty-seven million, two hundred twenty-one thousand, three hundred fifty-eight".