252243220 has 24 divisors (see below), whose sum is σ = 532677600. Its totient is φ = 100332192.

The previous prime is 252243217. The next prime is 252243227. The reversal of 252243220 is 22342252.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 252243191 and 252243200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252243227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31650 + ... + 38809.

It is an arithmetic number, because the mean of its divisors is an integer number (22194900).

Almost surely, 2^252243220 is an apocalyptic number.

252243220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252243220 is an abundant number, since it is smaller than the sum of its proper divisors (280434380).

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

252243220 is a wasteful number, since it uses less digits than its factorization.

252243220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70647 (or 70645 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 252243220 is about 15882.1667287559. The cubic root of 252243220 is about 631.8391040778.

Adding to 252243220 its reverse (22342252), we get a palindrome (274585472).

The spelling of 252243220 in words is "two hundred fifty-two million, two hundred forty-three thousand, two hundred twenty".