572566021 has 4 divisors (see below), whose sum is σ = 573102700. Its totient is φ = 572029344.

The previous prime is 572566019. The next prime is 572566037. The reversal of 572566021 is 120665275.

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

It can be written as a sum of positive squares in 2 ways, for example, as 435348225 + 137217796 = 20865^2 + 11714^2 .

It is a cyclic number.

It is not a de Polignac number, because 572566021 - 2¹ = 572566019 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 (572566061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266736 + ... + 268873.

It is an arithmetic number, because the mean of its divisors is an integer number (143275675).

Almost surely, 2^572566021 is an apocalyptic number.

It is an amenable number.

572566021 is a deficient number, since it is larger than the sum of its proper divisors (536679).

572566021 is a wasteful number, since it uses less digits than its factorization.

572566021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536678.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 572566021 is about 23928.3518237258. The cubic root of 572566021 is about 830.3767685101.

The spelling of 572566021 in words is "five hundred seventy-two million, five hundred sixty-six thousand, twenty-one".