822115772 has 12 divisors (see below), whose sum is σ = 1501255056. Its totient is φ = 393185760.

The previous prime is 822115771. The next prime is 822115781. The reversal of 822115772 is 277511228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822115771) 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, 4467929 + ... + 4468112.

It is an arithmetic number, because the mean of its divisors is an integer number (125104588).

Almost surely, 2^822115772 is an apocalyptic number.

It is an amenable number.

822115772 is a deficient number, since it is larger than the sum of its proper divisors (679139284).

822115772 is a wasteful number, since it uses less digits than its factorization.

822115772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8936068 (or 8936066 counting only the distinct ones).

The product of its digits is 15680, while the sum is 35.

The square root of 822115772 is about 28672.5613086798. The cubic root of 822115772 is about 936.7944879168.

The spelling of 822115772 in words is "eight hundred twenty-two million, one hundred fifteen thousand, seven hundred seventy-two".