2223665445521 has 8 divisors (see below), whose sum is σ = 2498834748480. Its totient is φ = 1963370158992.

The previous prime is 2223665445509. The next prime is 2223665445527. The reversal of 2223665445521 is 1255445663222.

2223665445521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2223665445521 is a prime.

It is a super-2 number, since 2×2223665445521² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2223665445527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3718503791 + ... + 3718504388.

It is an arithmetic number, because the mean of its divisors is an integer number (312354343560).

Almost surely, 2^{2223665445521} is an apocalyptic number.

It is an amenable number.

2223665445521 is a deficient number, since it is larger than the sum of its proper divisors (275169302959).

2223665445521 is a wasteful number, since it uses less digits than its factorization.

2223665445521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7437008215.

The product of its digits is 3456000, while the sum is 47.

The spelling of 2223665445521 in words is "two trillion, two hundred twenty-three billion, six hundred sixty-five million, four hundred forty-five thousand, five hundred twenty-one".