115125551 has 4 divisors (see below), whose sum is σ = 116004504. Its totient is φ = 114246600.

The previous prime is 115125529. The next prime is 115125589. The reversal of 115125551 is 155521511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155521511 = 2389 ⋅65099.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115125551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115125551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115124551) 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, 439280 + ... + 439541.

It is an arithmetic number, because the mean of its divisors is an integer number (29001126).

Almost surely, 2^115125551 is an apocalyptic number.

115125551 is a deficient number, since it is larger than the sum of its proper divisors (878953).

115125551 is an equidigital number, since it uses as much as digits as its factorization.

115125551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878952.

The product of its digits is 1250, while the sum is 26.

The square root of 115125551 is about 10729.6575434634. The cubic root of 115125551 is about 486.4713190356.

The spelling of 115125551 in words is "one hundred fifteen million, one hundred twenty-five thousand, five hundred fifty-one".