115613551 has 4 divisors (see below), whose sum is σ = 115643272. Its totient is φ = 115583832.

The previous prime is 115613543. The next prime is 115613591. The reversal of 115613551 is 155316511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155316511 = 7 ⋅22188073.

It is a cyclic number.

It is not a de Polignac number, because 115613551 - 2³ = 115613543 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 (115613591) 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, 7956 + ... + 17161.

It is an arithmetic number, because the mean of its divisors is an integer number (28910818).

Almost surely, 2^115613551 is an apocalyptic number.

115613551 is a deficient number, since it is larger than the sum of its proper divisors (29721).

115613551 is an equidigital number, since it uses as much as digits as its factorization.

115613551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29720.

The product of its digits is 2250, while the sum is 28.

The square root of 115613551 is about 10752.3742029377. The cubic root of 115613551 is about 487.1577098433.

The spelling of 115613551 in words is "one hundred fifteen million, six hundred thirteen thousand, five hundred fifty-one".