252117224 has 8 divisors (see below), whose sum is σ = 472719810. Its totient is φ = 126058608.

The previous prime is 252117221. The next prime is 252117263. The reversal of 252117224 is 422711252.

It can be written as a sum of positive squares in only one way, i.e., 210772324 + 41344900 = 14518^2 + 6430^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 252117193 and 252117202.

It is not an unprimeable number, because it can be changed into a prime (252117221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15757319 + ... + 15757334.

Almost surely, 2^252117224 is an apocalyptic number.

It is an amenable number.

252117224 is a deficient number, since it is larger than the sum of its proper divisors (220602586).

252117224 is a wasteful number, since it uses less digits than its factorization.

252117224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31514659 (or 31514655 counting only the distinct ones).

The product of its digits is 2240, while the sum is 26.

The square root of 252117224 is about 15878.1996460556. The cubic root of 252117224 is about 631.7338849188.

Adding to 252117224 its reverse (422711252), we get a palindrome (674828476).

The spelling of 252117224 in words is "two hundred fifty-two million, one hundred seventeen thousand, two hundred twenty-four".