252521022 has 32 divisors (see below), whose sum is σ = 547827840. Its totient is φ = 77136480.

The previous prime is 252521011. The next prime is 252521023. The reversal of 252521022 is 220125252.

It is a self number, because there is not a number n which added to its sum of digits gives 252521022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252521023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804 + ... + 22487.

It is an arithmetic number, because the mean of its divisors is an integer number (17119620).

Almost surely, 2^252521022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 252521022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273913920).

252521022 is an abundant number, since it is smaller than the sum of its proper divisors (295306818).

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

252521022 is a wasteful number, since it uses less digits than its factorization.

252521022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23448.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 252521022 is about 15890.9100431662. The cubic root of 252521022 is about 632.0709725749.

Adding to 252521022 its reverse (220125252), we get a palindrome (472646274).

The spelling of 252521022 in words is "two hundred fifty-two million, five hundred twenty-one thousand, twenty-two".