52508681 has 4 divisors (see below), whose sum is σ = 53228052. Its totient is φ = 51789312.

The previous prime is 52508671. The next prime is 52508683. The reversal of 52508681 is 18680525.

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 40195600 + 12313081 = 6340^2 + 3509^2 .

It is a cyclic number.

It is not a de Polignac number, because 52508681 - 2¹⁰ = 52507657 is a prime.

It is a super-2 number, since 2×52508681² = 5514323160719522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52508683) 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, 359576 + ... + 359721.

It is an arithmetic number, because the mean of its divisors is an integer number (13307013).

Almost surely, 2^52508681 is an apocalyptic number.

It is an amenable number.

52508681 is a deficient number, since it is larger than the sum of its proper divisors (719371).

52508681 is an equidigital number, since it uses as much as digits as its factorization.

52508681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719370.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 52508681 is about 7246.2873942454. The cubic root of 52508681 is about 374.4642566048.

It can be divided in two parts, 5250 and 8681, that added together give a palindrome (13931).

The spelling of 52508681 in words is "fifty-two million, five hundred eight thousand, six hundred eighty-one".