252523561 has 8 divisors (see below), whose sum is σ = 262989000. Its totient is φ = 242175360.

The previous prime is 252523543. The next prime is 252523573. The reversal of 252523561 is 165325252.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 49632025 + 202891536 = 7045^2 + 14244^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252523561 - 2⁵ = 252523529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252523501) 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 7 ways as a sum of consecutive naturals, for example, 24900 + ... + 33541.

It is an arithmetic number, because the mean of its divisors is an integer number (32873625).

Almost surely, 2^252523561 is an apocalyptic number.

It is an amenable number.

252523561 is a deficient number, since it is larger than the sum of its proper divisors (10465439).

252523561 is a wasteful number, since it uses less digits than its factorization.

252523561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58619.

The product of its digits is 18000, while the sum is 31.

The square root of 252523561 is about 15890.9899314045. The cubic root of 252523561 is about 632.0730909765.

The spelling of 252523561 in words is "two hundred fifty-two million, five hundred twenty-three thousand, five hundred sixty-one".