2186715081 has 4 divisors (see below), whose sum is σ = 2915620112. Its totient is φ = 1457810052.

The previous prime is 2186715071. The next prime is 2186715103. The reversal of 2186715081 is 1805176812.

2186715081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is not a de Polignac number, because 2186715081 - 2⁷ = 2186714953 is a prime.

It is a super-2 number, since 2×2186715081² = 9563445690945673122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2186715071) 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, 364452511 + ... + 364452516.

It is an arithmetic number, because the mean of its divisors is an integer number (728905028).

Almost surely, 2^2186715081 is an apocalyptic number.

It is an amenable number.

2186715081 is a deficient number, since it is larger than the sum of its proper divisors (728905031).

2186715081 is an equidigital number, since it uses as much as digits as its factorization.

2186715081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728905030.

The product of its (nonzero) digits is 26880, while the sum is 39.

The square root of 2186715081 is about 46762.3254447424. The cubic root of 2186715081 is about 1297.9682426112.

The spelling of 2186715081 in words is "two billion, one hundred eighty-six million, seven hundred fifteen thousand, eighty-one".