2115113081 has 2 divisors, whose sum is σ = 2115113082. Its totient is φ = 2115113080.

The previous prime is 2115113071. The next prime is 2115113093. The reversal of 2115113081 is 1803115112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1908903481 + 206209600 = 43691^2 + 14360^2 .

It is a cyclic number.

It is not a de Polignac number, because 2115113081 - 2³⁰ = 1041371257 is a prime.

It is a super-2 number, since 2×2115113081² = 8947406690834625122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2115113071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057556540 + 1057556541.

It is an arithmetic number, because the mean of its divisors is an integer number (1057556541).

Almost surely, 2^2115113081 is an apocalyptic number.

It is an amenable number.

2115113081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115113081 is an equidigital number, since it uses as much as digits as its factorization.

2115113081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 23.

The square root of 2115113081 is about 45990.3585656820. The cubic root of 2115113081 is about 1283.6438085189.

Adding to 2115113081 its reverse (1803115112), we get a palindrome (3918228193).

The spelling of 2115113081 in words is "two billion, one hundred fifteen million, one hundred thirteen thousand, eighty-one".