2155905179 has 2 divisors, whose sum is σ = 2155905180. Its totient is φ = 2155905178.

The previous prime is 2155905119. The next prime is 2155905187. The reversal of 2155905179 is 9715095512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2155905179 - 2⁸ = 2155904923 is a prime.

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, 1077952589 + 1077952590.

It is an arithmetic number, because the mean of its divisors is an integer number (1077952590).

Almost surely, 2^2155905179 is an apocalyptic number.

2155905179 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155905179 is an equidigital number, since it uses as much as digits as its factorization.

2155905179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141750, while the sum is 44.

The square root of 2155905179 is about 46431.7259963487. The cubic root of 2155905179 is about 1291.8434431787.

The spelling of 2155905179 in words is "two billion, one hundred fifty-five million, nine hundred five thousand, one hundred seventy-nine".