57221783 has 4 divisors (see below), whose sum is σ = 57336048. Its totient is φ = 57107520.

The previous prime is 57221761. The next prime is 57221789. The reversal of 57221783 is 38712275.

57221783 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57221783 - 2⁶ = 57221719 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 (57221789) 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, 56378 + ... + 57383.

It is an arithmetic number, because the mean of its divisors is an integer number (14334012).

Almost surely, 2^57221783 is an apocalyptic number.

57221783 is a deficient number, since it is larger than the sum of its proper divisors (114265).

57221783 is a wasteful number, since it uses less digits than its factorization.

57221783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114264.

The product of its digits is 23520, while the sum is 35.

The square root of 57221783 is about 7564.5081135524. The cubic root of 57221783 is about 385.3486087429.

The spelling of 57221783 in words is "fifty-seven million, two hundred twenty-one thousand, seven hundred eighty-three".