115781224 has 48 divisors (see below), whose sum is σ = 243261900. Its totient is φ = 51577344.

The previous prime is 115781221. The next prime is 115781321. The reversal of 115781224 is 422187511.

It can be written as a sum of positive squares in 6 ways, for example, as 34456900 + 81324324 = 5870^2 + 9018^2 .

It is not an unprimeable number, because it can be changed into a prime (115781221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37732 + ... + 40684.

Almost surely, 2^115781224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115781224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121630950).

115781224 is an abundant number, since it is smaller than the sum of its proper divisors (127480676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115781224 is a wasteful number, since it uses less digits than its factorization.

115781224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014 (or 2997 counting only the distinct ones).

The product of its digits is 4480, while the sum is 31.

The square root of 115781224 is about 10760.1684001692. The cubic root of 115781224 is about 487.3931024875.

The spelling of 115781224 in words is "one hundred fifteen million, seven hundred eighty-one thousand, two hundred twenty-four".