52209522 has 28 divisors (see below), whose sum is σ = 117420990. Its totient is φ = 17402688.

The previous prime is 52209491. The next prime is 52209529. The reversal of 52209522 is 22590225.

It can be written as a sum of positive squares in only one way, i.e., 44475561 + 7733961 = 6669^2 + 2781^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (52209529) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 16447 + ... + 19362.

Almost surely, 2^52209522 is an apocalyptic number.

52209522 is an abundant number, since it is smaller than the sum of its proper divisors (65211468).

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

52209522 is an equidigital number, since it uses as much as digits as its factorization.

52209522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35829 (or 35814 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 52209522 is about 7225.6156831096. The cubic root of 52209522 is about 373.7517536261.

Adding to 52209522 its reverse (22590225), we get a palindrome (74799747).

The spelling of 52209522 in words is "fifty-two million, two hundred nine thousand, five hundred twenty-two".