811221326 has 16 divisors (see below), whose sum is σ = 1267645680. Its totient is φ = 389008320.

The previous prime is 811221319. The next prime is 811221329. The reversal of 811221326 is 623122118.

It is a junction number, because it is equal to n+sod(n) for n = 811221295 and 811221304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811221329) 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, 79001 + ... + 88676.

It is an arithmetic number, because the mean of its divisors is an integer number (79227855).

Almost surely, 2^811221326 is an apocalyptic number.

811221326 is a deficient number, since it is larger than the sum of its proper divisors (456424354).

811221326 is a wasteful number, since it uses less digits than its factorization.

811221326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167779.

The product of its digits is 1152, while the sum is 26.

The square root of 811221326 is about 28481.9473702203. The cubic root of 811221326 is about 932.6380280939.

The spelling of 811221326 in words is "eight hundred eleven million, two hundred twenty-one thousand, three hundred twenty-six".