2220517345 has 4 divisors (see below), whose sum is σ = 2664620820. Its totient is φ = 1776413872.

The previous prime is 2220517301. The next prime is 2220517423. The reversal of 2220517345 is 5437150222.

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 468592609 + 1751924736 = 21647^2 + 41856^2 .

It is a cyclic number.

It is not a de Polignac number, because 2220517345 - 2¹³ = 2220509153 is a prime.

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, 222051730 + ... + 222051739.

It is an arithmetic number, because the mean of its divisors is an integer number (666155205).

Almost surely, 2^2220517345 is an apocalyptic number.

It is an amenable number.

2220517345 is a deficient number, since it is larger than the sum of its proper divisors (444103475).

2220517345 is an equidigital number, since it uses as much as digits as its factorization.

2220517345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444103474.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 2220517345 is about 47122.3656558115. The cubic root of 2220517345 is about 1304.6220765774.

Adding to 2220517345 its reverse (5437150222), we get a palindrome (7657667567).

The spelling of 2220517345 in words is "two billion, two hundred twenty million, five hundred seventeen thousand, three hundred forty-five".