252778911 has 32 divisors (see below), whose sum is σ = 421037568. Its totient is φ = 131053440.

The previous prime is 252778909. The next prime is 252778913. The reversal of 252778911 is 119877252.

It is an interprime number because it is at equal distance from previous prime (252778909) and next prime (252778913).

It is not a de Polignac number, because 252778911 - 2¹ = 252778909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252778913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183421 + ... + 184793.

It is an arithmetic number, because the mean of its divisors is an integer number (13157424).

Almost surely, 2^252778911 is an apocalyptic number.

252778911 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

252778911 is a deficient number, since it is larger than the sum of its proper divisors (168258657).

252778911 is a wasteful number, since it uses less digits than its factorization.

252778911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191.

The product of its digits is 70560, while the sum is 42.

The square root of 252778911 is about 15899.0223284327. The cubic root of 252778911 is about 632.2860684528.

The spelling of 252778911 in words is "two hundred fifty-two million, seven hundred seventy-eight thousand, nine hundred eleven".