2195633971 has 2 divisors, whose sum is σ = 2195633972. Its totient is φ = 2195633970.

The previous prime is 2195633911. The next prime is 2195633989. The reversal of 2195633971 is 1793365912.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2195633971 is a prime.

It is not a weakly prime, because it can be changed into another prime (2195633911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1097816985 + 1097816986.

It is an arithmetic number, because the mean of its divisors is an integer number (1097816986).

Almost surely, 2^2195633971 is an apocalyptic number.

2195633971 is a deficient number, since it is larger than the sum of its proper divisors (1).

2195633971 is an equidigital number, since it uses as much as digits as its factorization.

2195633971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 46.

The square root of 2195633971 is about 46857.5924584266. The cubic root of 2195633971 is about 1299.7305104109.

The spelling of 2195633971 in words is "two billion, one hundred ninety-five million, six hundred thirty-three thousand, nine hundred seventy-one".