823222773 has 24 divisors (see below), whose sum is σ = 1262311128. Its totient is φ = 515192832.

The previous prime is 823222759. The next prime is 823222781. The reversal of 823222773 is 377222328.

It can be written as a sum of positive squares in 4 ways, for example, as 404733924 + 418488849 = 20118^2 + 20457^2 .

It is a de Polignac number, because none of the positive numbers 2^k-823222773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823222793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 53965 + ... + 67517.

It is an arithmetic number, because the mean of its divisors is an integer number (52596297).

Almost surely, 2^823222773 is an apocalyptic number.

It is an amenable number.

823222773 is a deficient number, since it is larger than the sum of its proper divisors (439088355).

823222773 is a wasteful number, since it uses less digits than its factorization.

823222773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13973 (or 13970 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 823222773 is about 28691.8590021630. The cubic root of 823222773 is about 937.2147723237.

The spelling of 823222773 in words is "eight hundred twenty-three million, two hundred twenty-two thousand, seven hundred seventy-three".