115205140 has 24 divisors (see below), whose sum is σ = 243421920. Its totient is φ = 45798048.

The previous prime is 115205099. The next prime is 115205143. The reversal of 115205140 is 41502511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115205143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14410 + ... + 20929.

It is an arithmetic number, because the mean of its divisors is an integer number (10142580).

Almost surely, 2^115205140 is an apocalyptic number.

115205140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115205140 is an abundant number, since it is smaller than the sum of its proper divisors (128216780).

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

115205140 is a wasteful number, since it uses less digits than its factorization.

115205140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35511 (or 35509 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 115205140 is about 10733.3657349407. The cubic root of 115205140 is about 486.5833962323.

Adding to 115205140 its reverse (41502511), we get a palindrome (156707651).

It can be divided in two parts, 11 and 5205140, that added together give a triangular number (5205151 = T₃₂₂₆).

The spelling of 115205140 in words is "one hundred fifteen million, two hundred five thousand, one hundred forty".