252806143 has 4 divisors (see below), whose sum is σ = 256950568. Its totient is φ = 248661720.

The previous prime is 252806129. The next prime is 252806189. The reversal of 252806143 is 341608252.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252806143 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 (252806243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2072121 + ... + 2072242.

It is an arithmetic number, because the mean of its divisors is an integer number (64237642).

Almost surely, 2^252806143 is an apocalyptic number.

252806143 is a deficient number, since it is larger than the sum of its proper divisors (4144425).

252806143 is an equidigital number, since it uses as much as digits as its factorization.

252806143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4144424.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 252806143 is about 15899.8787102292. The cubic root of 252806143 is about 632.3087731369.

The spelling of 252806143 in words is "two hundred fifty-two million, eight hundred six thousand, one hundred forty-three".