55105500551 has 2 divisors, whose sum is σ = 55105500552. Its totient is φ = 55105500550.

The previous prime is 55105500529. The next prime is 55105500599. The reversal of 55105500551 is 15500550155.

55105500551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55105500551 - 2²⁶ = 55038391687 is a prime.

It is a super-2 number, since 2×55105500551² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55105506551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27552750275 + 27552750276.

It is an arithmetic number, because the mean of its divisors is an integer number (27552750276).

Almost surely, 2^55105500551 is an apocalyptic number.

55105500551 is a deficient number, since it is larger than the sum of its proper divisors (1).

55105500551 is an equidigital number, since it uses as much as digits as its factorization.

55105500551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15625, while the sum is 32.

The spelling of 55105500551 in words is "fifty-five billion, one hundred five million, five hundred thousand, five hundred fifty-one".