2155505311 has 2 divisors, whose sum is σ = 2155505312. Its totient is φ = 2155505310.

The previous prime is 2155505279. The next prime is 2155505321. The reversal of 2155505311 is 1135055512.

2155505311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2155505311 - 2⁵ = 2155505279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2155505311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155505321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077752655 + 1077752656.

It is an arithmetic number, because the mean of its divisors is an integer number (1077752656).

Almost surely, 2^2155505311 is an apocalyptic number.

2155505311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155505311 is an equidigital number, since it uses as much as digits as its factorization.

2155505311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 28.

The square root of 2155505311 is about 46427.4198184650. The cubic root of 2155505311 is about 1291.7635697225.

The spelling of 2155505311 in words is "two billion, one hundred fifty-five million, five hundred five thousand, three hundred eleven".