115516551 has 8 divisors (see below), whose sum is σ = 154281600. Its totient is φ = 76881272.

The previous prime is 115516549. The next prime is 115516559. The reversal of 115516551 is 155615511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115516551 - 2¹ = 115516549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115516559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30345 + ... + 33938.

It is an arithmetic number, because the mean of its divisors is an integer number (19285200).

Almost surely, 2^115516551 is an apocalyptic number.

115516551 is a deficient number, since it is larger than the sum of its proper divisors (38765049).

115516551 is an equidigital number, since it uses as much as digits as its factorization.

115516551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64885.

The product of its digits is 3750, while the sum is 30.

The square root of 115516551 is about 10747.8626247268. The cubic root of 115516551 is about 487.0214296262.

The spelling of 115516551 in words is "one hundred fifteen million, five hundred sixteen thousand, five hundred fifty-one".