115217280 has 192 divisors, whose sum is σ = 404323920. Its totient is φ = 30228480.

The previous prime is 115217233. The next prime is 115217293. The reversal of 115217280 is 82712511.

It is a tau number, because it is divible by the number of its divisors (192).

It is a super-2 number, since 2×115217280² = 26550043221196800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 477960 + ... + 478200.

Almost surely, 2^115217280 is an apocalyptic number.

115217280 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 115217280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202161960).

115217280 is an abundant number, since it is smaller than the sum of its proper divisors (289106640).

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

115217280 is a wasteful number, since it uses less digits than its factorization.

115217280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 115217280 is about 10733.9312462862. The cubic root of 115217280 is about 486.6004872375.

Adding to 115217280 its reverse (82712511), we get a palindrome (197929791).

The spelling of 115217280 in words is "one hundred fifteen million, two hundred seventeen thousand, two hundred eighty".