55105423019 has 2 divisors, whose sum is σ = 55105423020. Its totient is φ = 55105423018.

The previous prime is 55105423001. The next prime is 55105423033. The reversal of 55105423019 is 91032450155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55105423019 - 2²⁰ = 55104374443 is a prime.

It is a super-2 number, since 2×55105423019² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55105423019.

It is not a weakly prime, because it can be changed into another prime (55105423099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27552711509 + 27552711510.

It is an arithmetic number, because the mean of its divisors is an integer number (27552711510).

Almost surely, 2^55105423019 is an apocalyptic number.

55105423019 is a deficient number, since it is larger than the sum of its proper divisors (1).

55105423019 is an equidigital number, since it uses as much as digits as its factorization.

55105423019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 55105423019 in words is "fifty-five billion, one hundred five million, four hundred twenty-three thousand, nineteen".