115415220 has 48 divisors (see below), whose sum is σ = 325059840. Its totient is φ = 30596736.

The previous prime is 115415197. The next prime is 115415231. The reversal of 115415220 is 22514511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4821 + ... + 15939.

It is an arithmetic number, because the mean of its divisors is an integer number (6772080).

Almost surely, 2^115415220 is an apocalyptic number.

115415220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115415220 is an abundant number, since it is smaller than the sum of its proper divisors (209644620).

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

115415220 is a wasteful number, since it uses less digits than its factorization.

115415220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11304 (or 11302 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 115415220 is about 10743.1475834599. The cubic root of 115415220 is about 486.8789830673.

Adding to 115415220 its reverse (22514511), we get a palindrome (137929731).

It can be divided in two parts, 11541 and 5220, that added together give a palindrome (16761).

The spelling of 115415220 in words is "one hundred fifteen million, four hundred fifteen thousand, two hundred twenty".