77255 has 4 divisors (see below), whose sum is σ = 92712. Its totient is φ = 61800.

The previous prime is 77249. The next prime is 77261. The reversal of 77255 is 55277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55277 = 167 ⋅331.

It is an interprime number because it is at equal distance from previous prime (77249) and next prime (77261).

It is not a de Polignac number, because 77255 - 2⁴ = 77239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 77255.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7721 + ... + 7730.

It is an arithmetic number, because the mean of its divisors is an integer number (23178).

2⁷⁷²⁵⁵ is an apocalyptic number.

77255 is a deficient number, since it is larger than the sum of its proper divisors (15457).

77255 is a wasteful number, since it uses less digits than its factorization.

77255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15456.

The product of its digits is 2450, while the sum is 26.

The square root of 77255 is about 277.9478368327. The cubic root of 77255 is about 42.5901201860.

The spelling of 77255 in words is "seventy-seven thousand, two hundred fifty-five".