252820431 has 12 divisors (see below), whose sum is σ = 369289440. Its totient is φ = 166652640.

The previous prime is 252820387. The next prime is 252820453. The reversal of 252820431 is 134028252.

It is not a de Polignac number, because 252820431 - 2⁶ = 252820367 is a prime.

It is a super-2 number, since 2×252820431² = 127836340662051522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 252820395 and 252820404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252820471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 157015 + ... + 158616.

It is an arithmetic number, because the mean of its divisors is an integer number (30774120).

Almost surely, 2^252820431 is an apocalyptic number.

252820431 is a deficient number, since it is larger than the sum of its proper divisors (116469009).

252820431 is a wasteful number, since it uses less digits than its factorization.

252820431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315726 (or 315723 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 252820431 is about 15900.3280154845. The cubic root of 252820431 is about 632.3206851069.

Adding to 252820431 its reverse (134028252), we get a palindrome (386848683).

The spelling of 252820431 in words is "two hundred fifty-two million, eight hundred twenty thousand, four hundred thirty-one".