255394977 has 4 divisors (see below), whose sum is σ = 340526640. Its totient is φ = 170263316.

The previous prime is 255394973. The next prime is 255394981. The reversal of 255394977 is 779493552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (255394973) and next prime (255394981).

It is a cyclic number.

It is not a de Polignac number, because 255394977 - 2² = 255394973 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255394973) 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, 42565827 + ... + 42565832.

It is an arithmetic number, because the mean of its divisors is an integer number (85131660).

Almost surely, 2^255394977 is an apocalyptic number.

It is an amenable number.

255394977 is a deficient number, since it is larger than the sum of its proper divisors (85131663).

255394977 is an equidigital number, since it uses as much as digits as its factorization.

255394977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85131662.

The product of its digits is 2381400, while the sum is 51.

The square root of 255394977 is about 15981.0818469840. The cubic root of 255394977 is about 634.4598105026.

The spelling of 255394977 in words is "two hundred fifty-five million, three hundred ninety-four thousand, nine hundred seventy-seven".