2115818797 has 2 divisors, whose sum is σ = 2115818798. Its totient is φ = 2115818796.

The previous prime is 2115818723. The next prime is 2115818833. The reversal of 2115818797 is 7978185112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2002204516 + 113614281 = 44746^2 + 10659^2 .

It is a cyclic number.

It is not a de Polignac number, because 2115818797 - 2¹¹ = 2115816749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2115818797.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2115818717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057909398 + 1057909399.

It is an arithmetic number, because the mean of its divisors is an integer number (1057909399).

Almost surely, 2^2115818797 is an apocalyptic number.

It is an amenable number.

2115818797 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115818797 is an equidigital number, since it uses as much as digits as its factorization.

2115818797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 49.

The square root of 2115818797 is about 45998.0303600056. The cubic root of 2115818797 is about 1283.7865569532.

The spelling of 2115818797 in words is "two billion, one hundred fifteen million, eight hundred eighteen thousand, seven hundred ninety-seven".