255748239 has 8 divisors (see below), whose sum is σ = 378886320. Its totient is φ = 170498808.

The previous prime is 255748237. The next prime is 255748243. The reversal of 255748239 is 932847552.

It is not a de Polignac number, because 255748239 - 2¹ = 255748237 is a prime.

It is a super-2 number, since 2×255748239² = 130814323503202242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 255748194 and 255748203.

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4736052 + ... + 4736105.

It is an arithmetic number, because the mean of its divisors is an integer number (47360790).

Almost surely, 2^255748239 is an apocalyptic number.

255748239 is a deficient number, since it is larger than the sum of its proper divisors (123138081).

255748239 is an equidigital number, since it uses as much as digits as its factorization.

255748239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9472166 (or 9472160 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 255748239 is about 15992.1305334843. The cubic root of 255748239 is about 634.7522037262.

The spelling of 255748239 in words is "two hundred fifty-five million, seven hundred forty-eight thousand, two hundred thirty-nine".