2221303445 has 4 divisors (see below), whose sum is σ = 2665564140. Its totient is φ = 1777042752.

The previous prime is 2221303421. The next prime is 2221303477. The reversal of 2221303445 is 5443031222.

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 1294344529 + 926958916 = 35977^2 + 30446^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221303445 - 2²⁴ = 2204526229 is a prime.

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, 222130340 + ... + 222130349.

It is an arithmetic number, because the mean of its divisors is an integer number (666391035).

Almost surely, 2^2221303445 is an apocalyptic number.

It is an amenable number.

2221303445 is a deficient number, since it is larger than the sum of its proper divisors (444260695).

2221303445 is an equidigital number, since it uses as much as digits as its factorization.

2221303445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444260694.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 2221303445 is about 47130.7059675537. The cubic root of 2221303445 is about 1304.7760110375.

Adding to 2221303445 its reverse (5443031222), we get a palindrome (7664334667).

The spelling of 2221303445 in words is "two billion, two hundred twenty-one million, three hundred three thousand, four hundred forty-five".