115111551 has 8 divisors (see below), whose sum is σ = 157630384. Its totient is φ = 74666880.

The previous prime is 115111541. The next prime is 115111603. The reversal of 115111551 is 155111511.

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

It is not a de Polignac number, because 115111551 - 2¹⁵ = 115078783 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 (115111511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 518410 + ... + 518631.

It is an arithmetic number, because the mean of its divisors is an integer number (19703798).

Almost surely, 2^115111551 is an apocalyptic number.

115111551 is a deficient number, since it is larger than the sum of its proper divisors (42518833).

115111551 is a wasteful number, since it uses less digits than its factorization.

115111551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037081.

The product of its digits is 125, while the sum is 21.

The square root of 115111551 is about 10729.0051262920. The cubic root of 115111551 is about 486.4515988996.

The spelling of 115111551 in words is "one hundred fifteen million, one hundred eleven thousand, five hundred fifty-one".