252222440 has 32 divisors (see below), whose sum is σ = 573885000. Its totient is φ = 99753984.

The previous prime is 252222419. The next prime is 252222521. The reversal of 252222440 is 44222252.

252222440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 203975524 + 48246916 = 14282^2 + 6946^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31865 + ... + 38984.

Almost surely, 2^252222440 is an apocalyptic number.

252222440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252222440 is an abundant number, since it is smaller than the sum of its proper divisors (321662560).

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

252222440 is a wasteful number, since it uses less digits than its factorization.

252222440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70949 (or 70945 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 252222440 is about 15881.5125224268. The cubic root of 252222440 is about 631.8217531295.

Adding to 252222440 its reverse (44222252), we get a palindrome (296444692).

The spelling of 252222440 in words is "two hundred fifty-two million, two hundred twenty-two thousand, four hundred forty".