115081661 has 2 divisors, whose sum is σ = 115081662. Its totient is φ = 115081660.

The previous prime is 115081643. The next prime is 115081669. The reversal of 115081661 is 166180511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106729561 + 8352100 = 10331^2 + 2890^2 .

It is a cyclic number.

It is not a de Polignac number, because 115081661 - 2¹⁴ = 115065277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115081669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57540830 + 57540831.

It is an arithmetic number, because the mean of its divisors is an integer number (57540831).

Almost surely, 2^115081661 is an apocalyptic number.

It is an amenable number.

115081661 is a deficient number, since it is larger than the sum of its proper divisors (1).

115081661 is an equidigital number, since it uses as much as digits as its factorization.

115081661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 115081661 is about 10727.6120828449. The cubic root of 115081661 is about 486.4094910577.

The spelling of 115081661 in words is "one hundred fifteen million, eighty-one thousand, six hundred sixty-one".