52569569 has 4 divisors (see below), whose sum is σ = 56613396. Its totient is φ = 48525744.

The previous prime is 52569553. The next prime is 52569581. The reversal of 52569569 is 96596525.

It is a happy number.

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 25654225 + 26915344 = 5065^2 + 5188^2 .

It is a cyclic number.

It is not a de Polignac number, because 52569569 - 2⁴ = 52569553 is a prime.

It is a super-2 number, since 2×52569569² = 5527119169691522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52569509) 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, 2021894 + ... + 2021919.

It is an arithmetic number, because the mean of its divisors is an integer number (14153349).

Almost surely, 2^52569569 is an apocalyptic number.

It is an amenable number.

52569569 is a deficient number, since it is larger than the sum of its proper divisors (4043827).

52569569 is a wasteful number, since it uses less digits than its factorization.

52569569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043826.

The product of its digits is 729000, while the sum is 47.

The square root of 52569569 is about 7250.4875008512. The cubic root of 52569569 is about 374.6089410769.

The spelling of 52569569 in words is "fifty-two million, five hundred sixty-nine thousand, five hundred sixty-nine".