115431520 has 48 divisors (see below), whose sum is σ = 277201008. Its totient is φ = 45411840.

The previous prime is 115431499. The next prime is 115431521. The reversal of 115431520 is 25134511.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 115431491 and 115431500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115431521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3847 + ... + 15673.

It is an arithmetic number, because the mean of its divisors is an integer number (5775021).

Almost surely, 2^115431520 is an apocalyptic number.

115431520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115431520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138600504).

115431520 is an abundant number, since it is smaller than the sum of its proper divisors (161769488).

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

115431520 is a wasteful number, since it uses less digits than its factorization.

115431520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11903 (or 11895 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 115431520 is about 10743.9061797840. The cubic root of 115431520 is about 486.9019024993.

The spelling of 115431520 in words is "one hundred fifteen million, four hundred thirty-one thousand, five hundred twenty".