252778187 has 2 divisors, whose sum is σ = 252778188. Its totient is φ = 252778186.

The previous prime is 252778153. The next prime is 252778241. The reversal of 252778187 is 781877252.

252778187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252778187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (252778087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126389093 + 126389094.

It is an arithmetic number, because the mean of its divisors is an integer number (126389094).

Almost surely, 2^252778187 is an apocalyptic number.

252778187 is a deficient number, since it is larger than the sum of its proper divisors (1).

252778187 is an equidigital number, since it uses as much as digits as its factorization.

252778187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 439040, while the sum is 47.

The square root of 252778187 is about 15898.9995597207. Note that the first 3 decimals coincide. The cubic root of 252778187 is about 632.2854647955.

The spelling of 252778187 in words is "two hundred fifty-two million, seven hundred seventy-eight thousand, one hundred eighty-seven".