2155205263 has 2 divisors, whose sum is σ = 2155205264. Its totient is φ = 2155205262.

The previous prime is 2155205251. The next prime is 2155205291. The reversal of 2155205263 is 3625025512.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2155205263 - 2⁵ = 2155205231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155205203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077602631 + 1077602632.

It is an arithmetic number, because the mean of its divisors is an integer number (1077602632).

Almost surely, 2^2155205263 is an apocalyptic number.

2155205263 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155205263 is an equidigital number, since it uses as much as digits as its factorization.

2155205263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 2155205263 is about 46424.1883397007. The cubic root of 2155205263 is about 1291.7036287797.

The spelling of 2155205263 in words is "two billion, one hundred fifty-five million, two hundred five thousand, two hundred sixty-three".