564642143 has 4 divisors (see below), whose sum is σ = 608076168. Its totient is φ = 521208120.

The previous prime is 564642139. The next prime is 564642173. The reversal of 564642143 is 341246465.

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 564642143 - 2² = 564642139 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 (564642173) 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, 21716993 + ... + 21717018.

It is an arithmetic number, because the mean of its divisors is an integer number (152019042).

Almost surely, 2^564642143 is an apocalyptic number.

564642143 is a deficient number, since it is larger than the sum of its proper divisors (43434025).

564642143 is a wasteful number, since it uses less digits than its factorization.

564642143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43434024.

The product of its digits is 69120, while the sum is 35.

The square root of 564642143 is about 23762.1998771158. The cubic root of 564642143 is about 826.5283663633.

The spelling of 564642143 in words is "five hundred sixty-four million, six hundred forty-two thousand, one hundred forty-three".