2115773081 has 2 divisors, whose sum is σ = 2115773082. Its totient is φ = 2115773080.

The previous prime is 2115773057. The next prime is 2115773111. The reversal of 2115773081 is 1803775112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1450391056 + 665382025 = 38084^2 + 25795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2115773081 is a prime.

It is a super-2 number, since 2×2115773081² = 8952991460568465122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2115773041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1057886540 + 1057886541.

It is an arithmetic number, because the mean of its divisors is an integer number (1057886541).

Almost surely, 2^2115773081 is an apocalyptic number.

It is an amenable number.

2115773081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2115773081 is an equidigital number, since it uses as much as digits as its factorization.

2115773081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 2115773081 is about 45997.5334230000. The cubic root of 2115773081 is about 1283.7773107283. Note that the first 3 decimals are identical.

The spelling of 2115773081 in words is "two billion, one hundred fifteen million, seven hundred seventy-three thousand, eighty-one".