55055552251 has 12 divisors (see below), whose sum is σ = 66252636720. Its totient is φ = 45563214480.

The previous prime is 55055552243. The next prime is 55055552269. The reversal of 55055552251 is 15225555055.

It is not a de Polignac number, because 55055552251 - 2³ = 55055552243 is a prime.

It is a super-2 number, since 2×55055552251² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55055555251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19370695 + ... + 19373536.

It is an arithmetic number, because the mean of its divisors is an integer number (5521053060).

Almost surely, 2^55055552251 is an apocalyptic number.

55055552251 is a deficient number, since it is larger than the sum of its proper divisors (11197084469).

55055552251 is a wasteful number, since it uses less digits than its factorization.

55055552251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38744274 (or 38744267 counting only the distinct ones).

The product of its (nonzero) digits is 312500, while the sum is 40.

The spelling of 55055552251 in words is "fifty-five billion, fifty-five million, five hundred fifty-two thousand, two hundred fifty-one".