52552581 has 4 divisors (see below), whose sum is σ = 70070112. Its totient is φ = 35035052.

The previous prime is 52552573. The next prime is 52552597. The reversal of 52552581 is 18525525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 52552581 - 2³ = 52552573 is a prime.

It is a super-2 number, since 2×52552581² = 5523547539523122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52552501) 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, 8758761 + ... + 8758766.

It is an arithmetic number, because the mean of its divisors is an integer number (17517528).

Almost surely, 2^52552581 is an apocalyptic number.

It is an amenable number.

52552581 is a deficient number, since it is larger than the sum of its proper divisors (17517531).

52552581 is a wasteful number, since it uses less digits than its factorization.

52552581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17517530.

The product of its digits is 20000, while the sum is 33.

The square root of 52552581 is about 7249.3158987590. The cubic root of 52552581 is about 374.5685847616.

The spelling of 52552581 in words is "fifty-two million, five hundred fifty-two thousand, five hundred eighty-one".