22155131412 has 72 divisors (see below), whose sum is σ = 59250391200. Its totient is φ = 6960800448.

The previous prime is 22155131399. The next prime is 22155131417. The reversal of 22155131412 is 21413155122.

It is a happy number.

22155131412 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 513 + 141 + 2 = 666.

It is a super-2 number, since 2×22155131412² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22155131417) 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, 52539 + ... + 216957.

It is an arithmetic number, because the mean of its divisors is an integer number (822922100).

Almost surely, 2^22155131412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22155131412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29625195600).

22155131412 is an abundant number, since it is smaller than the sum of its proper divisors (37095259788).

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

22155131412 is a wasteful number, since it uses less digits than its factorization.

22155131412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164645 (or 164640 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

Adding to 22155131412 its reverse (21413155122), we get a palindrome (43568286534).

The spelling of 22155131412 in words is "twenty-two billion, one hundred fifty-five million, one hundred thirty-one thousand, four hundred twelve".