252909278443 has 4 divisors (see below), whose sum is σ = 267786294840. Its totient is φ = 238032262048.

The previous prime is 252909278441. The next prime is 252909278459. The reversal of 252909278443 is 344872909252.

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 252909278443 - 2¹ = 252909278441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252909278441) 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, 7438508173 + ... + 7438508206.

It is an arithmetic number, because the mean of its divisors is an integer number (66946573710).

Almost surely, 2^252909278443 is an apocalyptic number.

252909278443 is a deficient number, since it is larger than the sum of its proper divisors (14877016397).

252909278443 is a wasteful number, since it uses less digits than its factorization.

252909278443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14877016396.

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 252909278443 in words is "two hundred fifty-two billion, nine hundred nine million, two hundred seventy-eight thousand, four hundred forty-three".