2172300391 has 2 divisors, whose sum is σ = 2172300392. Its totient is φ = 2172300390.

The previous prime is 2172300301. The next prime is 2172300421. The reversal of 2172300391 is 1930032712.

2172300391 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 2172300391 - 2⁹ = 2172299879 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172300301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086150195 + 1086150196.

It is an arithmetic number, because the mean of its divisors is an integer number (1086150196).

Almost surely, 2^2172300391 is an apocalyptic number.

2172300391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172300391 is an equidigital number, since it uses as much as digits as its factorization.

2172300391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 2172300391 is about 46607.9434324236. The cubic root of 2172300391 is about 1295.1099107182.

The spelling of 2172300391 in words is "two billion, one hundred seventy-two million, three hundred thousand, three hundred ninety-one".