822921612 has 24 divisors (see below), whose sum is σ = 1932870912. Its totient is φ = 272490000.

The previous prime is 822921611. The next prime is 822921643. The reversal of 822921612 is 216129228.

It is not an unprimeable number, because it can be changed into a prime (822921611) 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, 225264 + ... + 228887.

It is an arithmetic number, because the mean of its divisors is an integer number (80536288).

Almost surely, 2^822921612 is an apocalyptic number.

It is an amenable number.

822921612 is an abundant number, since it is smaller than the sum of its proper divisors (1109949300).

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

822921612 is a wasteful number, since it uses less digits than its factorization.

822921612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454309 (or 454307 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 822921612 is about 28686.6103260737. The cubic root of 822921612 is about 937.1004707546.

It can be divided in two parts, 8229216 and 12, that added together give a palindrome (8229228).

The spelling of 822921612 in words is "eight hundred twenty-two million, nine hundred twenty-one thousand, six hundred twelve".