8223539573 has 4 divisors (see below), whose sum is σ = 8226758220. Its totient is φ = 8220320928.

The previous prime is 8223539563. The next prime is 8223539633. The reversal of 8223539573 is 3759353228.

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 2278821169 + 5944718404 = 47737^2 + 77102^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8223539573 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8223539563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605488 + ... + 1610601.

It is an arithmetic number, because the mean of its divisors is an integer number (2056689555).

Almost surely, 2^8223539573 is an apocalyptic number.

It is an amenable number.

8223539573 is a deficient number, since it is larger than the sum of its proper divisors (3218647).

8223539573 is a wasteful number, since it uses less digits than its factorization.

8223539573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218646.

The product of its digits is 1360800, while the sum is 47.

The square root of 8223539573 is about 90683.7337839593. The cubic root of 8223539573 is about 2018.4574352894.

The spelling of 8223539573 in words is "eight billion, two hundred twenty-three million, five hundred thirty-nine thousand, five hundred seventy-three".