252130321 has 8 divisors (see below), whose sum is σ = 267874920. Its totient is φ = 236855808.

The previous prime is 252130303. The next prime is 252130327. The reversal of 252130321 is 123031252.

It can be written as a sum of positive squares in 4 ways, for example, as 19140625 + 232989696 = 4375^2 + 15264^2 .

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 252130321 - 2¹⁷ = 251999249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252130327) 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, 116416 + ... + 118561.

It is an arithmetic number, because the mean of its divisors is an integer number (33484365).

Almost surely, 2^252130321 is an apocalyptic number.

It is an amenable number.

252130321 is a deficient number, since it is larger than the sum of its proper divisors (15744599).

252130321 is a wasteful number, since it uses less digits than its factorization.

252130321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235043.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 252130321 is about 15878.6120615122. The cubic root of 252130321 is about 631.7448238454.

Adding to 252130321 its reverse (123031252), we get a palindrome (375161573).

The spelling of 252130321 in words is "two hundred fifty-two million, one hundred thirty thousand, three hundred twenty-one".