57221553 has 8 divisors (see below), whose sum is σ = 78926400. Its totient is φ = 36832208.

The previous prime is 57221543. The next prime is 57221569. The reversal of 57221553 is 35512275.

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

It is a cyclic number.

It is not a de Polignac number, because 57221553 - 2¹⁰ = 57220529 is a prime.

It is a super-2 number, since 2×57221553² = 6548612255463618, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 57221553.

It is not an unprimeable number, because it can be changed into a prime (57221533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328773 + ... + 328946.

It is an arithmetic number, because the mean of its divisors is an integer number (9865800).

Almost surely, 2^57221553 is an apocalyptic number.

It is an amenable number.

57221553 is a deficient number, since it is larger than the sum of its proper divisors (21704847).

57221553 is a wasteful number, since it uses less digits than its factorization.

57221553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657751.

The product of its digits is 10500, while the sum is 30.

The square root of 57221553 is about 7564.4929109624. The cubic root of 57221553 is about 385.3480924459.

The spelling of 57221553 in words is "fifty-seven million, two hundred twenty-one thousand, five hundred fifty-three".