52686522 has 72 divisors (see below), whose sum is σ = 134106336. Its totient is φ = 14640912.

The previous prime is 52686521. The next prime is 52686551. The reversal of 52686522 is 22568625.

52686522 is a `hidden beast` number, since 52 + 6 + 86 + 522 = 666.

Its product of digits (57600) is a multiple of the sum of its prime factors (240).

It is not an unprimeable number, because it can be changed into a prime (52686521) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 666879 + ... + 666957.

It is an arithmetic number, because the mean of its divisors is an integer number (1862588).

Almost surely, 2^52686522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52686522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67053168).

52686522 is an abundant number, since it is smaller than the sum of its proper divisors (81419814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52686522 is a wasteful number, since it uses less digits than its factorization.

52686522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240 (or 158 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 52686522 is about 7258.5482019478. The cubic root of 52686522 is about 374.8865363395.

The spelling of 52686522 in words is "fifty-two million, six hundred eighty-six thousand, five hundred twenty-two".