115197290 has 32 divisors (see below), whose sum is σ = 228762576. Its totient is φ = 41495040.

The previous prime is 115197281. The next prime is 115197307. The reversal of 115197290 is 92791511.

It is a Cunningham number, because it is equal to 10733²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 38477209 + 76720081 = 6203^2 + 8759^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 115197290.

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, 5477 + ... + 16136.

Almost surely, 2^115197290 is an apocalyptic number.

115197290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115197290 is a deficient number, since it is larger than the sum of its proper divisors (113565286).

115197290 is a wasteful number, since it uses less digits than its factorization.

115197290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21674.

The product of its (nonzero) digits is 5670, while the sum is 35.

The square root of 115197290 is about 10733.0000465853. Note that the first 4 decimals coincide. The cubic root of 115197290 is about 486.5723441605.

The spelling of 115197290 in words is "one hundred fifteen million, one hundred ninety-seven thousand, two hundred ninety".