52645581 has 12 divisors (see below), whose sum is σ = 76501152. Its totient is φ = 34885896.

The previous prime is 52645531. The next prime is 52645609. The reversal of 52645581 is 18554625.

52645581 is a `hidden beast` number, since 5 + 2 + 645 + 5 + 8 + 1 = 666.

It is not a de Polignac number, because 52645581 - 2¹⁴ = 52629197 is a prime.

It is a super-2 number, since 2×52645581² = 5543114397655122, 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 (52645531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16011 + ... + 19016.

It is an arithmetic number, because the mean of its divisors is an integer number (6375096).

Almost surely, 2^52645581 is an apocalyptic number.

It is an amenable number.

52645581 is a deficient number, since it is larger than the sum of its proper divisors (23855571).

52645581 is a wasteful number, since it uses less digits than its factorization.

52645581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35200 (or 35197 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 52645581 is about 7255.7274618056. The cubic root of 52645581 is about 374.7894070905.

The spelling of 52645581 in words is "fifty-two million, six hundred forty-five thousand, five hundred eighty-one".