252528281 has 4 divisors (see below), whose sum is σ = 252561972. Its totient is φ = 252494592.

The previous prime is 252528277. The next prime is 252528299. The reversal of 252528281 is 182825252.

252528281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 222278281 + 30250000 = 14909^2 + 5500^2 .

It is a cyclic number.

It is not a de Polignac number, because 252528281 - 2² = 252528277 is a prime.

It is a super-2 number, since 2×252528281² = 127541065409629922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252528271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41 + ... + 22473.

It is an arithmetic number, because the mean of its divisors is an integer number (63140493).

Almost surely, 2^252528281 is an apocalyptic number.

It is an amenable number.

252528281 is a deficient number, since it is larger than the sum of its proper divisors (33691).

252528281 is a wasteful number, since it uses less digits than its factorization.

252528281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33690.

The product of its digits is 25600, while the sum is 35.

The square root of 252528281 is about 15891.1384425409. The cubic root of 252528281 is about 632.0770290466.

It can be divided in two parts, 25252 and 8281, that added together give a palindrome (33533).

The spelling of 252528281 in words is "two hundred fifty-two million, five hundred twenty-eight thousand, two hundred eighty-one".