115253209 has 4 divisors (see below), whose sum is σ = 115735680. Its totient is φ = 114770740.

The previous prime is 115253147. The next prime is 115253239. The reversal of 115253209 is 902352511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 902352511 = 83 ⋅10871717.

It is a cyclic number.

It is not a de Polignac number, because 115253209 - 2¹¹ = 115251161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115253239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240877 + ... + 241354.

It is an arithmetic number, because the mean of its divisors is an integer number (28933920).

Almost surely, 2^115253209 is an apocalyptic number.

It is an amenable number.

115253209 is a deficient number, since it is larger than the sum of its proper divisors (482471).

115253209 is an equidigital number, since it uses as much as digits as its factorization.

115253209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482470.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 115253209 is about 10735.6047337819. The cubic root of 115253209 is about 486.6510619775.

The spelling of 115253209 in words is "one hundred fifteen million, two hundred fifty-three thousand, two hundred nine".