252065521 has 4 divisors (see below), whose sum is σ = 252127732. Its totient is φ = 252003312.

The previous prime is 252065507. The next prime is 252065551. The reversal of 252065521 is 125560252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 165482496 + 86583025 = 12864^2 + 9305^2 .

It is a cyclic number.

It is not a de Polignac number, because 252065521 - 2⁷ = 252065393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 252065521.

It is not an unprimeable number, because it can be changed into a prime (252065551) 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, 24570 + ... + 33283.

It is an arithmetic number, because the mean of its divisors is an integer number (63031933).

Almost surely, 2^252065521 is an apocalyptic number.

It is an amenable number.

252065521 is a deficient number, since it is larger than the sum of its proper divisors (62211).

252065521 is an equidigital number, since it uses as much as digits as its factorization.

252065521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62210.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 252065521 is about 15876.5714497810. The cubic root of 252065521 is about 631.6906976406.

The spelling of 252065521 in words is "two hundred fifty-two million, sixty-five thousand, five hundred twenty-one".