115117551 has 16 divisors (see below), whose sum is σ = 171162720. Its totient is φ = 76466880.

The previous prime is 115117543. The next prime is 115117567. The reversal of 115117551 is 155711511.

It is a happy number.

115117551 is a nontrivial binomial coefficient, being equal to C(15174, 2).

It is not a de Polignac number, because 115117551 - 2³ = 115117543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115117531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1 + ... + 15173.

It is an arithmetic number, because the mean of its divisors is an integer number (10697670).

Almost surely, 2^115117551 is an apocalyptic number.

115117551 is the 15173-rd triangular number and also the 7587-th hexagonal number.

115117551 is a deficient number, since it is larger than the sum of its proper divisors (56045169).

115117551 is a wasteful number, since it uses less digits than its factorization.

115117551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15463 (or 15457 counting only the distinct ones).

The product of its digits is 875, while the sum is 27.

The square root of 115117551 is about 10729.2847385089. The cubic root of 115117551 is about 486.4600505823.

The spelling of 115117551 in words is "one hundred fifteen million, one hundred seventeen thousand, five hundred fifty-one".