255234478 has 4 divisors (see below), whose sum is σ = 382851720. Its totient is φ = 127617238.

The previous prime is 255234457. The next prime is 255234479. The reversal of 255234478 is 874432552.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 255234478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255234479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63808618 + ... + 63808621.

It is an arithmetic number, because the mean of its divisors is an integer number (95712930).

Almost surely, 2^255234478 is an apocalyptic number.

255234478 is a deficient number, since it is larger than the sum of its proper divisors (127617242).

255234478 is a wasteful number, since it uses less digits than its factorization.

255234478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127617241.

The product of its digits is 268800, while the sum is 40.

The square root of 255234478 is about 15976.0595266793. The cubic root of 255234478 is about 634.3268771863.

The spelling of 255234478 in words is "two hundred fifty-five million, two hundred thirty-four thousand, four hundred seventy-eight".