2179422251 has 2 divisors, whose sum is σ = 2179422252. Its totient is φ = 2179422250.

The previous prime is 2179422187. The next prime is 2179422257. The reversal of 2179422251 is 1522249712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2179422251 - 2⁶ = 2179422187 is a prime.

It is not a weakly prime, because it can be changed into another prime (2179422257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089711125 + 1089711126.

It is an arithmetic number, because the mean of its divisors is an integer number (1089711126).

Almost surely, 2^2179422251 is an apocalyptic number.

2179422251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2179422251 is an equidigital number, since it uses as much as digits as its factorization.

2179422251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 2179422251 is about 46684.2826977132. The cubic root of 2179422251 is about 1296.5237007593.

The spelling of 2179422251 in words is "two billion, one hundred seventy-nine million, four hundred twenty-two thousand, two hundred fifty-one".