115115551 has 8 divisors (see below), whose sum is σ = 122027904. Its totient is φ = 108218880.

The previous prime is 115115543. The next prime is 115115557. The reversal of 115115551 is 155511511.

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 115115551 - 2³ = 115115543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115115557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13431 + ... + 20263.

It is an arithmetic number, because the mean of its divisors is an integer number (15253488).

Almost surely, 2^115115551 is an apocalyptic number.

115115551 is a deficient number, since it is larger than the sum of its proper divisors (6912353).

115115551 is an equidigital number, since it uses as much as digits as its factorization.

115115551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7841.

The product of its digits is 625, while the sum is 25.

The square root of 115115551 is about 10729.1915352463. The cubic root of 115115551 is about 486.4572333873.

The spelling of 115115551 in words is "one hundred fifteen million, one hundred fifteen thousand, five hundred fifty-one".