115531645 has 32 divisors (see below), whose sum is σ = 150232320. Its totient is φ = 85071360.

The previous prime is 115531631. The next prime is 115531667. The reversal of 115531645 is 546135511.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-115531645 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 504391 + ... + 504619.

It is an arithmetic number, because the mean of its divisors is an integer number (4694760).

Almost surely, 2^115531645 is an apocalyptic number.

It is an amenable number.

115531645 is a deficient number, since it is larger than the sum of its proper divisors (34700675).

115531645 is a wasteful number, since it uses less digits than its factorization.

115531645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405.

The product of its digits is 9000, while the sum is 31.

The square root of 115531645 is about 10748.5647879147. The cubic root of 115531645 is about 487.0426409627.

The spelling of 115531645 in words is "one hundred fifteen million, five hundred thirty-one thousand, six hundred forty-five".