2155872233 has 2 divisors, whose sum is σ = 2155872234. Its totient is φ = 2155872232.

The previous prime is 2155872227. The next prime is 2155872283. The reversal of 2155872233 is 3322785512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2118576784 + 37295449 = 46028^2 + 6107^2 .

It is a cyclic number.

It is not a de Polignac number, because 2155872233 - 2⁴ = 2155872217 is a prime.

It is not a weakly prime, because it can be changed into another prime (2155872203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077936116 + 1077936117.

It is an arithmetic number, because the mean of its divisors is an integer number (1077936117).

Almost surely, 2^2155872233 is an apocalyptic number.

It is an amenable number.

2155872233 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155872233 is an equidigital number, since it uses as much as digits as its factorization.

2155872233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 38.

The square root of 2155872233 is about 46431.3712160216. The cubic root of 2155872233 is about 1291.8368626032.

The spelling of 2155872233 in words is "two billion, one hundred fifty-five million, eight hundred seventy-two thousand, two hundred thirty-three".