57221701 has 4 divisors (see below), whose sum is σ = 58439232. Its totient is φ = 56004172.

The previous prime is 57221693. The next prime is 57221719. The reversal of 57221701 is 10712275.

It is a happy number.

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 57221701 - 2³ = 57221693 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 (57221741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608695 + ... + 608788.

It is an arithmetic number, because the mean of its divisors is an integer number (14609808).

Almost surely, 2^57221701 is an apocalyptic number.

It is an amenable number.

57221701 is a deficient number, since it is larger than the sum of its proper divisors (1217531).

57221701 is a wasteful number, since it uses less digits than its factorization.

57221701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217530.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 57221701 is about 7564.5026935021. The cubic root of 57221701 is about 385.3484246719.

Adding to 57221701 its reverse (10712275), we get a palindrome (67933976).

The spelling of 57221701 in words is "fifty-seven million, two hundred twenty-one thousand, seven hundred one".