2155905119 has 2 divisors, whose sum is σ = 2155905120. Its totient is φ = 2155905118.

The previous prime is 2155905109. The next prime is 2155905179. The reversal of 2155905119 is 9115095512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2155905119 is a prime.

It is a super-2 number, since 2×2155905119² = 9295853764260808322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155905109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077952559 + 1077952560.

It is an arithmetic number, because the mean of its divisors is an integer number (1077952560).

Almost surely, 2^2155905119 is an apocalyptic number.

2155905119 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155905119 is an equidigital number, since it uses as much as digits as its factorization.

2155905119 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20250, while the sum is 38.

The square root of 2155905119 is about 46431.7253502387. The cubic root of 2155905119 is about 1291.8434311945.

The spelling of 2155905119 in words is "two billion, one hundred fifty-five million, nine hundred five thousand, one hundred nineteen".