22155321366 has 192 divisors, whose sum is σ = 56790429696. Its totient is φ = 6432307200.

The previous prime is 22155321359. The next prime is 22155321373. The reversal of 22155321366 is 66312355122.

22155321366 is a `hidden beast` number, since 2 + 21 + 553 + 21 + 3 + 66 = 666.

It is an interprime number because it is at equal distance from previous prime (22155321359) and next prime (22155321373).

It is a super-2 number, since 2×22155321366² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22155321366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5888926 + ... + 5892686.

It is an arithmetic number, because the mean of its divisors is an integer number (295783488).

Almost surely, 2^22155321366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22155321366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28395214848).

22155321366 is an abundant number, since it is smaller than the sum of its proper divisors (34635108330).

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

22155321366 is a wasteful number, since it uses less digits than its factorization.

22155321366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849 (or 3837 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

Adding to 22155321366 its reverse (66312355122), we get a palindrome (88467676488).

The spelling of 22155321366 in words is "twenty-two billion, one hundred fifty-five million, three hundred twenty-one thousand, three hundred sixty-six".