247775255 has 64 divisors (see below), whose sum is σ = 392491008. Its totient is φ = 145704960.

The previous prime is 247775249. The next prime is 247775261. The reversal of 247775255 is 552577742.

It is an interprime number because it is at equal distance from previous prime (247775249) and next prime (247775261).

It is not a de Polignac number, because 247775255 - 2⁴ = 247775239 is a prime.

It is a super-2 number, since 2×247775255² = 122785153980630050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 796550 + ... + 796860.

It is an arithmetic number, because the mean of its divisors is an integer number (6132672).

Almost surely, 2^247775255 is an apocalyptic number.

247775255 is a deficient number, since it is larger than the sum of its proper divisors (144715753).

247775255 is a wasteful number, since it uses less digits than its factorization.

247775255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456.

The product of its digits is 686000, while the sum is 44.

The square root of 247775255 is about 15740.8784697678. The cubic root of 247775255 is about 628.0862855936.

The spelling of 247775255 in words is "two hundred forty-seven million, seven hundred seventy-five thousand, two hundred fifty-five".