2221226615 has 4 divisors (see below), whose sum is σ = 2665471944. Its totient is φ = 1776981288.

The previous prime is 2221226599. The next prime is 2221226629. The reversal of 2221226615 is 5166221222.

2221226615 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.

It is a cyclic number.

It is not a de Polignac number, because 2221226615 - 2⁴ = 2221226599 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, 222122657 + ... + 222122666.

It is an arithmetic number, because the mean of its divisors is an integer number (666367986).

Almost surely, 2^2221226615 is an apocalyptic number.

2221226615 is a deficient number, since it is larger than the sum of its proper divisors (444245329).

2221226615 is an equidigital number, since it uses as much as digits as its factorization.

2221226615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444245328.

The product of its digits is 5760, while the sum is 29.

The square root of 2221226615 is about 47129.8908867822. The cubic root of 2221226615 is about 1304.7609677534.

Adding to 2221226615 its reverse (5166221222), we get a palindrome (7387447837).

The spelling of 2221226615 in words is "two billion, two hundred twenty-one million, two hundred twenty-six thousand, six hundred fifteen".