252211572 has 18 divisors (see below), whose sum is σ = 637534898. Its totient is φ = 84070512.

The previous prime is 252211571. The next prime is 252211591. The reversal of 252211572 is 275112252.

It can be written as a sum of positive squares in only one way, i.e., 206324496 + 45887076 = 14364^2 + 6774^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×252211572² = 127221354101422368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252211571) 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 5 ways as a sum of consecutive naturals, for example, 3502903 + ... + 3502974.

Almost surely, 2^252211572 is an apocalyptic number.

It is an amenable number.

252211572 is an abundant number, since it is smaller than the sum of its proper divisors (385323326).

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

252211572 is a wasteful number, since it uses less digits than its factorization.

252211572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7005887 (or 7005882 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 252211572 is about 15881.1703598948. The cubic root of 252211572 is about 631.8126781540.

The spelling of 252211572 in words is "two hundred fifty-two million, two hundred eleven thousand, five hundred seventy-two".