255778503 has 4 divisors (see below), whose sum is σ = 341038008. Its totient is φ = 170519000.

The previous prime is 255778499. The next prime is 255778531. The reversal of 255778503 is 305877552.

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

It is a cyclic number.

It is not a de Polignac number, because 255778503 - 2² = 255778499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255778543) 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, 42629748 + ... + 42629753.

It is an arithmetic number, because the mean of its divisors is an integer number (85259502).

Almost surely, 2^255778503 is an apocalyptic number.

255778503 is a deficient number, since it is larger than the sum of its proper divisors (85259505).

255778503 is an equidigital number, since it uses as much as digits as its factorization.

255778503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85259504.

The product of its (nonzero) digits is 294000, while the sum is 42.

The square root of 255778503 is about 15993.0767208814. The cubic root of 255778503 is about 634.7772405659. Note that the first 3 decimals are identical.

The spelling of 255778503 in words is "two hundred fifty-five million, seven hundred seventy-eight thousand, five hundred three".