252138343 has 4 divisors (see below), whose sum is σ = 253685368. Its totient is φ = 250591320.

The previous prime is 252138311. The next prime is 252138347. The reversal of 252138343 is 343831252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 252138343 - 2⁵ = 252138311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252138347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 773268 + ... + 773593.

It is an arithmetic number, because the mean of its divisors is an integer number (63421342).

Almost surely, 2^252138343 is an apocalyptic number.

252138343 is a deficient number, since it is larger than the sum of its proper divisors (1547025).

252138343 is a wasteful number, since it uses less digits than its factorization.

252138343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1547024.

The product of its digits is 17280, while the sum is 31.

The square root of 252138343 is about 15878.8646634449. The cubic root of 252138343 is about 631.7515238239.

Adding to 252138343 its reverse (343831252), we get a palindrome (595969595).

The spelling of 252138343 in words is "two hundred fifty-two million, one hundred thirty-eight thousand, three hundred forty-three".