52394581 has 4 divisors (see below), whose sum is σ = 53383212. Its totient is φ = 51405952.

The previous prime is 52394569. The next prime is 52394591. The reversal of 52394581 is 18549325.

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 29268100 + 23126481 = 5410^2 + 4809^2 .

It is a cyclic number.

It is not a de Polignac number, because 52394581 - 2⁵ = 52394549 is a prime.

It is a super-2 number, since 2×52394581² = 5490384236331122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52394581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52394591) 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, 494236 + ... + 494341.

It is an arithmetic number, because the mean of its divisors is an integer number (13345803).

Almost surely, 2^52394581 is an apocalyptic number.

It is an amenable number.

52394581 is a deficient number, since it is larger than the sum of its proper divisors (988631).

52394581 is an equidigital number, since it uses as much as digits as its factorization.

52394581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988630.

The product of its digits is 43200, while the sum is 37.

The square root of 52394581 is about 7238.4101154881. The cubic root of 52394581 is about 374.1928262048.

It can be divided in two parts, 52394 and 581, that added together give a triangular number (52975 = T₃₂₅).

The spelling of 52394581 in words is "fifty-two million, three hundred ninety-four thousand, five hundred eighty-one".