52185581 has 4 divisors (see below), whose sum is σ = 59640672. Its totient is φ = 44730492.

The previous prime is 52185569. The next prime is 52185619. The reversal of 52185581 is 18558125.

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 52185581 - 2¹⁰ = 52184557 is a prime.

It is a super-2 number, since 2×52185581² = 5446669728615122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52185521) 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, 3727535 + ... + 3727548.

It is an arithmetic number, because the mean of its divisors is an integer number (14910168).

Almost surely, 2^52185581 is an apocalyptic number.

It is an amenable number.

52185581 is a deficient number, since it is larger than the sum of its proper divisors (7455091).

52185581 is an equidigital number, since it uses as much as digits as its factorization.

52185581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7455090.

The product of its digits is 16000, while the sum is 35.

The square root of 52185581 is about 7223.9588177121. The cubic root of 52185581 is about 373.6946161637.

The spelling of 52185581 in words is "fifty-two million, one hundred eighty-five thousand, five hundred eighty-one".