255133521455 has 4 divisors (see below), whose sum is σ = 306160225752. Its totient is φ = 204106817160.

The previous prime is 255133521443. The next prime is 255133521457. The reversal of 255133521455 is 554125331552.

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

It is not a de Polignac number, because 255133521455 - 2⁴ = 255133521439 is a prime.

It is a super-2 number, since 2×255133521455² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255133521457) 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, 25513352141 + ... + 25513352150.

It is an arithmetic number, because the mean of its divisors is an integer number (76540056438).

Almost surely, 2^255133521455 is an apocalyptic number.

255133521455 is a deficient number, since it is larger than the sum of its proper divisors (51026704297).

255133521455 is an equidigital number, since it uses as much as digits as its factorization.

255133521455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51026704296.

The product of its digits is 450000, while the sum is 41.

The spelling of 255133521455 in words is "two hundred fifty-five billion, one hundred thirty-three million, five hundred twenty-one thousand, four hundred fifty-five".