252131217 has 16 divisors (see below), whose sum is σ = 363357120. Its totient is φ = 154590912.

The previous prime is 252131207. The next prime is 252131219. The reversal of 252131217 is 712131252.

It is not a de Polignac number, because 252131217 - 2²⁰ = 251082641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252131219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 867 + ... + 22472.

It is an arithmetic number, because the mean of its divisors is an integer number (22709820).

Almost surely, 2^252131217 is an apocalyptic number.

It is an amenable number.

252131217 is a deficient number, since it is larger than the sum of its proper divisors (111225903).

252131217 is a wasteful number, since it uses less digits than its factorization.

252131217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23632.

The product of its digits is 840, while the sum is 24.

The square root of 252131217 is about 15878.6402755400. The cubic root of 252131217 is about 631.7455721921.

Adding to 252131217 its reverse (712131252), we get a palindrome (964262469).

The spelling of 252131217 in words is "two hundred fifty-two million, one hundred thirty-one thousand, two hundred seventeen".