7952108221 has 2 divisors, whose sum is σ = 7952108222. Its totient is φ = 7952108220.

The previous prime is 7952108179. The next prime is 7952108231. The reversal of 7952108221 is 1228012597.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5931156196 + 2020952025 = 77014^2 + 44955^2 .

It is a cyclic number.

It is not a de Polignac number, because 7952108221 - 2⁷ = 7952108093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7952108231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3976054110 + 3976054111.

It is an arithmetic number, because the mean of its divisors is an integer number (3976054111).

Almost surely, 2^7952108221 is an apocalyptic number.

It is an amenable number.

7952108221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7952108221 is an equidigital number, since it uses as much as digits as its factorization.

7952108221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 7952108221 is about 89174.5940332783. The cubic root of 7952108221 is about 1996.0010278568.

The spelling of 7952108221 in words is "seven billion, nine hundred fifty-two million, one hundred eight thousand, two hundred twenty-one".