255782551 has 4 divisors (see below), whose sum is σ = 255831472. Its totient is φ = 255733632.

The previous prime is 255782521. The next prime is 255782573. The reversal of 255782551 is 155287552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255782551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255782521) 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, 15531 + ... + 27436.

It is an arithmetic number, because the mean of its divisors is an integer number (63957868).

Almost surely, 2^255782551 is an apocalyptic number.

255782551 is a deficient number, since it is larger than the sum of its proper divisors (48921).

255782551 is an equidigital number, since it uses as much as digits as its factorization.

255782551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48920.

The product of its digits is 140000, while the sum is 40.

The square root of 255782551 is about 15993.2032751416. The cubic root of 255782551 is about 634.7805892507.

The spelling of 255782551 in words is "two hundred fifty-five million, seven hundred eighty-two thousand, five hundred fifty-one".