115202981 has 2 divisors, whose sum is σ = 115202982. Its totient is φ = 115202980.

The previous prime is 115202963. The next prime is 115203017. The reversal of 115202981 is 189202511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74114881 + 41088100 = 8609^2 + 6410^2 .

It is a cyclic number.

It is not a de Polignac number, because 115202981 - 2⁶ = 115202917 is a prime.

It is a super-2 number, since 2×115202981² = 26543453662572722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115202911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57601490 + 57601491.

It is an arithmetic number, because the mean of its divisors is an integer number (57601491).

Almost surely, 2^115202981 is an apocalyptic number.

It is an amenable number.

115202981 is a deficient number, since it is larger than the sum of its proper divisors (1).

115202981 is an equidigital number, since it uses as much as digits as its factorization.

115202981 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 115202981 is about 10733.2651602390. The cubic root of 115202981 is about 486.5803566106.

The spelling of 115202981 in words is "one hundred fifteen million, two hundred two thousand, nine hundred eighty-one".