2171922667 has 2 divisors, whose sum is σ = 2171922668. Its totient is φ = 2171922666.

The previous prime is 2171922653. The next prime is 2171922671. The reversal of 2171922667 is 7662291712.

2171922667 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 a de Polignac number, because none of the positive numbers 2^k-2171922667 is a prime.

It is not a weakly prime, because it can be changed into another prime (2171922617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085961333 + 1085961334.

It is an arithmetic number, because the mean of its divisors is an integer number (1085961334).

Almost surely, 2^2171922667 is an apocalyptic number.

2171922667 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171922667 is an equidigital number, since it uses as much as digits as its factorization.

2171922667 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 2171922667 is about 46603.8911143694. The cubic root of 2171922667 is about 1295.0348409205.

The spelling of 2171922667 in words is "two billion, one hundred seventy-one million, nine hundred twenty-two thousand, six hundred sixty-seven".