811223080 has 16 divisors (see below), whose sum is σ = 1825252020. Its totient is φ = 324489216.

The previous prime is 811223059. The next prime is 811223129. The reversal of 811223080 is 80322118.

It can be written as a sum of positive squares in 2 ways, for example, as 790846884 + 20376196 = 28122^2 + 4514^2 .

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, 10140249 + ... + 10140328.

Almost surely, 2^811223080 is an apocalyptic number.

It is an amenable number.

811223080 is an abundant number, since it is smaller than the sum of its proper divisors (1014028940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811223080 is a wasteful number, since it uses less digits than its factorization.

811223080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20280588 (or 20280584 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 811223080 is about 28481.9781616376. The cubic root of 811223080 is about 932.6387002680.

Adding to 811223080 its reverse (80322118), we get a palindrome (891545198).

The spelling of 811223080 in words is "eight hundred eleven million, two hundred twenty-three thousand, eighty".