252320161 has 8 divisors (see below), whose sum is σ = 255479400. Its totient is φ = 249180288.

The previous prime is 252320149. The next prime is 252320179. The reversal of 252320161 is 161023252.

It can be written as a sum of positive squares in 4 ways, for example, as 170145936 + 82174225 = 13044^2 + 9065^2 .

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 252320161 - 2⁹ = 252319649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252320141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22315 + ... + 31663.

It is an arithmetic number, because the mean of its divisors is an integer number (31934925).

Almost surely, 2^252320161 is an apocalyptic number.

It is an amenable number.

252320161 is a deficient number, since it is larger than the sum of its proper divisors (3159239).

252320161 is a wasteful number, since it uses less digits than its factorization.

252320161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9683.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 252320161 is about 15884.5887891377. The cubic root of 252320161 is about 631.9033402152.

The spelling of 252320161 in words is "two hundred fifty-two million, three hundred twenty thousand, one hundred sixty-one".