2115085897 has 4 divisors (see below), whose sum is σ = 2120110276. Its totient is φ = 2110061520.

The previous prime is 2115085883. The next prime is 2115085927. The reversal of 2115085897 is 7985805112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 724094281 + 1390991616 = 26909^2 + 37296^2 .

It is a cyclic number.

It is not a de Polignac number, because 2115085897 - 2⁷ = 2115085769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2115085807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2511558 + ... + 2512399.

It is an arithmetic number, because the mean of its divisors is an integer number (530027569).

Almost surely, 2^2115085897 is an apocalyptic number.

It is an amenable number.

2115085897 is a deficient number, since it is larger than the sum of its proper divisors (5024379).

2115085897 is an equidigital number, since it uses as much as digits as its factorization.

2115085897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024378.

The product of its (nonzero) digits is 201600, while the sum is 46.

The square root of 2115085897 is about 45990.0630245274. The cubic root of 2115085897 is about 1283.6383092507.

The spelling of 2115085897 in words is "two billion, one hundred fifteen million, eighty-five thousand, eight hundred ninety-seven".