252251561 has 4 divisors (see below), whose sum is σ = 252492624. Its totient is φ = 252010500.

The previous prime is 252251551. The next prime is 252251621. The reversal of 252251561 is 165152252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252251561 - 2⁶ = 252251497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252251521) 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 3 ways as a sum of consecutive naturals, for example, 118955 + ... + 121056.

It is an arithmetic number, because the mean of its divisors is an integer number (63123156).

Almost surely, 2^252251561 is an apocalyptic number.

It is an amenable number.

252251561 is a deficient number, since it is larger than the sum of its proper divisors (241063).

252251561 is a wasteful number, since it uses less digits than its factorization.

252251561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241062.

The product of its digits is 6000, while the sum is 29.

The square root of 252251561 is about 15882.4293167009. The cubic root of 252251561 is about 631.8460684035.

The spelling of 252251561 in words is "two hundred fifty-two million, two hundred fifty-one thousand, five hundred sixty-one".