255178213 has 4 divisors (see below), whose sum is σ = 255338028. Its totient is φ = 255018400.

The previous prime is 255178153. The next prime is 255178241. The reversal of 255178213 is 312871552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64931364 + 190246849 = 8058^2 + 13793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255178213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255178013) 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, 77488 + ... + 80713.

It is an arithmetic number, because the mean of its divisors is an integer number (63834507).

Almost surely, 2^255178213 is an apocalyptic number.

It is an amenable number.

255178213 is a deficient number, since it is larger than the sum of its proper divisors (159815).

255178213 is a wasteful number, since it uses less digits than its factorization.

255178213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159814.

The product of its digits is 16800, while the sum is 34.

The square root of 255178213 is about 15974.2985135498. The cubic root of 255178213 is about 634.2802625009.

The spelling of 255178213 in words is "two hundred fifty-five million, one hundred seventy-eight thousand, two hundred thirteen".