2155872319 has 2 divisors, whose sum is σ = 2155872320. Its totient is φ = 2155872318.

The previous prime is 2155872283. The next prime is 2155872337. The reversal of 2155872319 is 9132785512.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2155872319 - 2⁹ = 2155871807 is a prime.

It is a super-2 number, since 2×2155872319² = 9295570911660875522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2155872349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077936159 + 1077936160.

It is an arithmetic number, because the mean of its divisors is an integer number (1077936160).

Almost surely, 2^2155872319 is an apocalyptic number.

2155872319 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155872319 is an equidigital number, since it uses as much as digits as its factorization.

2155872319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The square root of 2155872319 is about 46431.3721421196. The cubic root of 2155872319 is about 1291.8368797807.

The spelling of 2155872319 in words is "two billion, one hundred fifty-five million, eight hundred seventy-two thousand, three hundred nineteen".