115520220 has 72 divisors (see below), whose sum is σ = 354397680. Its totient is φ = 30455040.

The previous prime is 115520203. The next prime is 115520227. The reversal of 115520220 is 22025511.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 115520193 and 115520202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115520227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12415 + ... + 19625.

It is an arithmetic number, because the mean of its divisors is an integer number (4922190).

Almost surely, 2^115520220 is an apocalyptic number.

115520220 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 115520220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177198840).

115520220 is an abundant number, since it is smaller than the sum of its proper divisors (238877460).

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

115520220 is a wasteful number, since it uses less digits than its factorization.

115520220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7315 (or 7310 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 115520220 is about 10748.0333084709. The cubic root of 115520220 is about 487.0265857783.

Adding to 115520220 its reverse (22025511), we get a palindrome (137545731).

The spelling of 115520220 in words is "one hundred fifteen million, five hundred twenty thousand, two hundred twenty".