52565619 has 4 divisors (see below), whose sum is σ = 70087496. Its totient is φ = 35043744.

The previous prime is 52565549. The next prime is 52565627. The reversal of 52565619 is 91656525.

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

It is not a de Polignac number, because 52565619 - 2¹⁶ = 52500083 is a prime.

It is a super-2 number, since 2×52565619² = 5526288601706322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52565659) 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, 8760934 + ... + 8760939.

It is an arithmetic number, because the mean of its divisors is an integer number (17521874).

Almost surely, 2^52565619 is an apocalyptic number.

52565619 is a deficient number, since it is larger than the sum of its proper divisors (17521877).

52565619 is a wasteful number, since it uses less digits than its factorization.

52565619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17521876.

The product of its digits is 81000, while the sum is 39.

The square root of 52565619 is about 7250.2151002574. The cubic root of 52565619 is about 374.5995583205.

The spelling of 52565619 in words is "fifty-two million, five hundred sixty-five thousand, six hundred nineteen".