255521110551 has 32 divisors (see below), whose sum is σ = 399606939648. Its totient is φ = 142221082080.

The previous prime is 255521110513. The next prime is 255521110553. The reversal of 255521110551 is 155011125552.

It is not a de Polignac number, because 255521110551 - 2¹⁰ = 255521109527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255521110553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 908631 + ... + 1156136.

It is an arithmetic number, because the mean of its divisors is an integer number (12487716864).

Almost surely, 2^255521110551 is an apocalyptic number.

255521110551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

255521110551 is a deficient number, since it is larger than the sum of its proper divisors (144085829097).

255521110551 is a wasteful number, since it uses less digits than its factorization.

255521110551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064931.

The product of its (nonzero) digits is 12500, while the sum is 33.

The spelling of 255521110551 in words is "two hundred fifty-five billion, five hundred twenty-one million, one hundred ten thousand, five hundred fifty-one".