251420255255 has 16 divisors (see below), whose sum is σ = 325201749600. Its totient is φ = 185498805888.

The previous prime is 251420255249. The next prime is 251420255257. The reversal of 251420255255 is 552552024152.

It is a cyclic number.

It is not a de Polignac number, because 251420255255 - 2³⁴ = 234240386071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251420255257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1649180 + ... + 1795169.

It is an arithmetic number, because the mean of its divisors is an integer number (20325109350).

Almost surely, 2^251420255255 is an apocalyptic number.

251420255255 is a deficient number, since it is larger than the sum of its proper divisors (73781494345).

251420255255 is a wasteful number, since it uses less digits than its factorization.

251420255255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445490.

The product of its (nonzero) digits is 200000, while the sum is 38.

The spelling of 251420255255 in words is "two hundred fifty-one billion, four hundred twenty million, two hundred fifty-five thousand, two hundred fifty-five".