255748231 has 4 divisors (see below), whose sum is σ = 256565632. Its totient is φ = 254930832.

The previous prime is 255748223. The next prime is 255748237. The reversal of 255748231 is 132847552.

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 255748231 - 2³ = 255748223 is a prime.

It is a super-2 number, since 2×255748231² = 130814315319258722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255748237) 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, 408231 + ... + 408856.

It is an arithmetic number, because the mean of its divisors is an integer number (64141408).

Almost surely, 2^255748231 is an apocalyptic number.

255748231 is a deficient number, since it is larger than the sum of its proper divisors (817401).

255748231 is an equidigital number, since it uses as much as digits as its factorization.

255748231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817400.

The product of its digits is 67200, while the sum is 37.

The square root of 255748231 is about 15992.1302833613. The cubic root of 255748231 is about 634.7521971077.

The spelling of 255748231 in words is "two hundred fifty-five million, seven hundred forty-eight thousand, two hundred thirty-one".