115166621 has 2 divisors, whose sum is σ = 115166622. Its totient is φ = 115166620.

The previous prime is 115166609. The next prime is 115166641. The reversal of 115166621 is 126661511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68244121 + 46922500 = 8261^2 + 6850^2 .

It is a cyclic number.

It is not a de Polignac number, because 115166621 - 2²² = 110972317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115166641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57583310 + 57583311.

It is an arithmetic number, because the mean of its divisors is an integer number (57583311).

Almost surely, 2^115166621 is an apocalyptic number.

It is an amenable number.

115166621 is a deficient number, since it is larger than the sum of its proper divisors (1).

115166621 is an equidigital number, since it uses as much as digits as its factorization.

115166621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 29.

The square root of 115166621 is about 10731.5712269919. The cubic root of 115166621 is about 486.5291602404.

The spelling of 115166621 in words is "one hundred fifteen million, one hundred sixty-six thousand, six hundred twenty-one".