2865818213 has 4 divisors (see below), whose sum is σ = 2866184748. Its totient is φ = 2865451680.

The previous prime is 2865818177. The next prime is 2865818237. The reversal of 2865818213 is 3128185682.

2865818213 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 an emirpimes, since its reverse is a distinct semiprime: 3128185682 = 2 ⋅1564092841.

It can be written as a sum of positive squares in 2 ways, for example, as 200987329 + 2664830884 = 14177^2 + 51622^2 .

It is a cyclic number.

It is not a de Polignac number, because 2865818213 - 2¹⁰ = 2865817189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2865818243) 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, 171278 + ... + 187263.

It is an arithmetic number, because the mean of its divisors is an integer number (716546187).

Almost surely, 2^2865818213 is an apocalyptic number.

It is an amenable number.

2865818213 is a deficient number, since it is larger than the sum of its proper divisors (366535).

2865818213 is an equidigital number, since it uses as much as digits as its factorization.

2865818213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366534.

The product of its digits is 184320, while the sum is 44.

The square root of 2865818213 is about 53533.3373982979. The cubic root of 2865818213 is about 1420.4181491885.

The spelling of 2865818213 in words is "two billion, eight hundred sixty-five million, eight hundred eighteen thousand, two hundred thirteen".