822213549 has 12 divisors (see below), whose sum is σ = 1216609212. Its totient is φ = 534772800.

The previous prime is 822213547. The next prime is 822213563. The reversal of 822213549 is 945312228.

It is a happy number.

822213549 is a `hidden beast` number, since 82 + 22 + 13 + 549 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10989225 + 811224324 = 3315^2 + 28482^2 .

It is not a de Polignac number, because 822213549 - 2¹ = 822213547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822213541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1113742 + ... + 1114479.

It is an arithmetic number, because the mean of its divisors is an integer number (101384101).

Almost surely, 2^822213549 is an apocalyptic number.

It is an amenable number.

822213549 is a deficient number, since it is larger than the sum of its proper divisors (394395663).

822213549 is a wasteful number, since it uses less digits than its factorization.

822213549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228268 (or 2228265 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 822213549 is about 28674.2663201694. The cubic root of 822213549 is about 936.8316251533.

The spelling of 822213549 in words is "eight hundred twenty-two million, two hundred thirteen thousand, five hundred forty-nine".