2217823045 has 16 divisors (see below), whose sum is σ = 2740188528. Its totient is φ = 1722165760.

The previous prime is 2217823037. The next prime is 2217823061. The reversal of 2217823045 is 5403287122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 25897921 + 2191925124 = 5089^2 + 46818^2 .

It is not a de Polignac number, because 2217823045 - 2³ = 2217823037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2217823045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12927 + ... + 67843.

It is an arithmetic number, because the mean of its divisors is an integer number (171261783).

Almost surely, 2^2217823045 is an apocalyptic number.

It is an amenable number.

2217823045 is a deficient number, since it is larger than the sum of its proper divisors (522365483).

2217823045 is a wasteful number, since it uses less digits than its factorization.

2217823045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55160.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 2217823045 is about 47093.7686429956. The cubic root of 2217823045 is about 1304.0942017099.

The spelling of 2217823045 in words is "two billion, two hundred seventeen million, eight hundred twenty-three thousand, forty-five".