252621523 has 16 divisors (see below), whose sum is σ = 325820160. Its totient is φ = 190058400.

The previous prime is 252621521. The next prime is 252621527. The reversal of 252621523 is 325126252.

It is not a de Polignac number, because 252621523 - 2¹ = 252621521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 252621491 and 252621500.

It is not an unprimeable number, because it can be changed into a prime (252621521) 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, 54333 + ... + 58798.

It is an arithmetic number, because the mean of its divisors is an integer number (20363760).

Almost surely, 2^252621523 is an apocalyptic number.

252621523 is a deficient number, since it is larger than the sum of its proper divisors (73198637).

252621523 is a wasteful number, since it uses less digits than its factorization.

252621523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113178.

The product of its digits is 7200, while the sum is 28.

The square root of 252621523 is about 15894.0719452254. The cubic root of 252621523 is about 632.1548142275.

Adding to 252621523 its reverse (325126252), we get a palindrome (577747775).

The spelling of 252621523 in words is "two hundred fifty-two million, six hundred twenty-one thousand, five hundred twenty-three".