252778155 has 16 divisors (see below), whose sum is σ = 462223104. Its totient is φ = 115555680.

The previous prime is 252778153. The next prime is 252778187. The reversal of 252778155 is 551877252.

252778155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 252778155 - 2¹ = 252778153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252778153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1203601 + ... + 1203810.

It is an arithmetic number, because the mean of its divisors is an integer number (28888944).

Almost surely, 2^252778155 is an apocalyptic number.

252778155 is a deficient number, since it is larger than the sum of its proper divisors (209444949).

252778155 is a wasteful number, since it uses less digits than its factorization.

252778155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407426.

The product of its digits is 196000, while the sum is 42.

The square root of 252778155 is about 15898.9985533681. The cubic root of 252778155 is about 632.2854381145.

The spelling of 252778155 in words is "two hundred fifty-two million, seven hundred seventy-eight thousand, one hundred fifty-five".