22011215452 has 12 divisors (see below), whose sum is σ = 38796747640. Its totient is φ = 10926430416.

The previous prime is 22011215419. The next prime is 22011215453. The reversal of 22011215452 is 25451211022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011215453) 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, 19793703 + ... + 19794814.

Almost surely, 2^22011215452 is an apocalyptic number.

It is an amenable number.

22011215452 is a deficient number, since it is larger than the sum of its proper divisors (16785532188).

22011215452 is a wasteful number, since it uses less digits than its factorization.

22011215452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39588660 (or 39588658 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 22011215452 its reverse (25451211022), we get a palindrome (47462426474).

The spelling of 22011215452 in words is "twenty-two billion, eleven million, two hundred fifteen thousand, four hundred fifty-two".