2315666081 has 2 divisors, whose sum is σ = 2315666082. Its totient is φ = 2315666080.

The previous prime is 2315666029. The next prime is 2315666137. The reversal of 2315666081 is 1806665132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2307937681 + 7728400 = 48041^2 + 2780^2 .

It is a cyclic number.

It is not a de Polignac number, because 2315666081 - 2¹⁴ = 2315649697 is a prime.

It is a super-2 number, since 2×2315666081² = 10724618797387797122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2315666281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1157833040 + 1157833041.

It is an arithmetic number, because the mean of its divisors is an integer number (1157833041).

Almost surely, 2^2315666081 is an apocalyptic number.

It is an amenable number.

2315666081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2315666081 is an equidigital number, since it uses as much as digits as its factorization.

2315666081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 2315666081 is about 48121.3682369901. The cubic root of 2315666081 is about 1322.9963462006.

The spelling of 2315666081 in words is "two billion, three hundred fifteen million, six hundred sixty-six thousand, eighty-one".