115515101 has 4 divisors (see below), whose sum is σ = 124400892. Its totient is φ = 106629312.

The previous prime is 115515077. The next prime is 115515133. The reversal of 115515101 is 101515511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5244100 + 110271001 = 2290^2 + 10501^2 .

It is a cyclic number.

It is not a de Polignac number, because 115515101 - 2¹⁸ = 115252957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115515181) 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 in 3 ways as a sum of consecutive naturals, for example, 4442876 + ... + 4442901.

It is an arithmetic number, because the mean of its divisors is an integer number (31100223).

Almost surely, 2^115515101 is an apocalyptic number.

It is an amenable number.

115515101 is a deficient number, since it is larger than the sum of its proper divisors (8885791).

115515101 is an equidigital number, since it uses as much as digits as its factorization.

115515101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8885790.

The product of its (nonzero) digits is 125, while the sum is 20.

The square root of 115515101 is about 10747.7951692429. The cubic root of 115515101 is about 487.0193918691.

The spelling of 115515101 in words is "one hundred fifteen million, five hundred fifteen thousand, one hundred one".