2206400815 has 4 divisors (see below), whose sum is σ = 2647680984. Its totient is φ = 1765120648.

The previous prime is 2206400803. The next prime is 2206400839. The reversal of 2206400815 is 5180046022.

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

It is a cyclic number.

It is not a de Polignac number, because 2206400815 - 2¹⁹ = 2205876527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220640077 + ... + 220640086.

It is an arithmetic number, because the mean of its divisors is an integer number (661920246).

Almost surely, 2^2206400815 is an apocalyptic number.

2206400815 is a deficient number, since it is larger than the sum of its proper divisors (441280169).

2206400815 is an equidigital number, since it uses as much as digits as its factorization.

2206400815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441280168.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 2206400815 is about 46972.3409572059. The cubic root of 2206400815 is about 1301.8515657395.

Adding to 2206400815 its reverse (5180046022), we get a palindrome (7386446837).

The spelling of 2206400815 in words is "two billion, two hundred six million, four hundred thousand, eight hundred fifteen".