252778163 has 4 divisors (see below), whose sum is σ = 275758008. Its totient is φ = 229798320.

The previous prime is 252778153. The next prime is 252778187. The reversal of 252778163 is 361877252.

252778163 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 252778163 - 2⁸ = 252777907 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 252778163.

It is not an unprimeable number, because it can be changed into a prime (252778103) 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, 11489906 + ... + 11489927.

It is an arithmetic number, because the mean of its divisors is an integer number (68939502).

Almost surely, 2^252778163 is an apocalyptic number.

252778163 is a deficient number, since it is larger than the sum of its proper divisors (22979845).

252778163 is a wasteful number, since it uses less digits than its factorization.

252778163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22979844.

The product of its digits is 141120, while the sum is 41.

The square root of 252778163 is about 15898.9988049562. The cubic root of 252778163 is about 632.2854447847.

The spelling of 252778163 in words is "two hundred fifty-two million, seven hundred seventy-eight thousand, one hundred sixty-three".