252043521 has 16 divisors (see below), whose sum is σ = 342448320. Its totient is φ = 164848320.

The previous prime is 252043501. The next prime is 252043537. The reversal of 252043521 is 125340252.

It is a de Polignac number, because none of the positive numbers 2^k-252043521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 252043491 and 252043500.

It is not an unprimeable number, because it can be changed into a prime (252043501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79515 + ... + 82623.

It is an arithmetic number, because the mean of its divisors is an integer number (21403020).

Almost surely, 2^252043521 is an apocalyptic number.

It is an amenable number.

252043521 is a deficient number, since it is larger than the sum of its proper divisors (90404799).

252043521 is a wasteful number, since it uses less digits than its factorization.

252043521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 252043521 is about 15875.8785898608. The cubic root of 252043521 is about 631.6723193506.

Adding to 252043521 its reverse (125340252), we get a palindrome (377383773).

The spelling of 252043521 in words is "two hundred fifty-two million, forty-three thousand, five hundred twenty-one".