8223212761 has 4 divisors (see below), whose sum is σ = 8315608500. Its totient is φ = 8130817024.

The previous prime is 8223212759. The next prime is 8223212807. The reversal of 8223212761 is 1672123228.

It is a happy number.

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 4744454400 + 3478758361 = 68880^2 + 58981^2 .

It is a cyclic number.

It is not a de Polignac number, because 8223212761 - 2¹ = 8223212759 is a prime.

It is a super-2 number, since 2×8223212761² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8223212161) 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, 46197736 + ... + 46197913.

It is an arithmetic number, because the mean of its divisors is an integer number (2078902125).

Almost surely, 2^8223212761 is an apocalyptic number.

It is an amenable number.

8223212761 is a deficient number, since it is larger than the sum of its proper divisors (92395739).

8223212761 is an equidigital number, since it uses as much as digits as its factorization.

8223212761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92395738.

The product of its digits is 16128, while the sum is 34.

The square root of 8223212761 is about 90681.9318331938. The cubic root of 8223212761 is about 2018.4306964039.

Adding to 8223212761 its reverse (1672123228), we get a palindrome (9895335989).

The spelling of 8223212761 in words is "eight billion, two hundred twenty-three million, two hundred twelve thousand, seven hundred sixty-one".