2221624045 has 8 divisors (see below), whose sum is σ = 2669590296. Its totient is φ = 1774871616.

The previous prime is 2221624019. The next prime is 2221624051. The reversal of 2221624045 is 5404261222.

2221624045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1137173284 + 1084450761 = 33722^2 + 32931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2221624045 - 2⁷ = 2221623917 is a prime.

It is a super-2 number, since 2×2221624045² = 9871226794644324050, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 299422 + ... + 306751.

It is an arithmetic number, because the mean of its divisors is an integer number (333698787).

Almost surely, 2^2221624045 is an apocalyptic number.

It is an amenable number.

2221624045 is a deficient number, since it is larger than the sum of its proper divisors (447966251).

2221624045 is an equidigital number, since it uses as much as digits as its factorization.

2221624045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606911.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 2221624045 is about 47134.1070245316. The cubic root of 2221624045 is about 1304.8387806495.

Adding to 2221624045 its reverse (5404261222), we get a palindrome (7625885267).

The spelling of 2221624045 in words is "two billion, two hundred twenty-one million, six hundred twenty-four thousand, forty-five".