22521451224 has 32 divisors (see below), whose sum is σ = 56308800240. Its totient is φ = 7506460800.

The previous prime is 22521451193. The next prime is 22521451229. The reversal of 22521451224 is 42215412522.

It is a super-2 number, since 2×22521451224² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22521451191 and 22521451200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22521451229) 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, 270034 + ... + 343454.

Almost surely, 2^22521451224 is an apocalyptic number.

22521451224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22521451224 is an abundant number, since it is smaller than the sum of its proper divisors (33787349016).

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

22521451224 is a wasteful number, since it uses less digits than its factorization.

22521451224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86211 (or 86207 counting only the distinct ones).

The product of its digits is 12800, while the sum is 30.

Adding to 22521451224 its reverse (42215412522), we get a palindrome (64736863746).

The spelling of 22521451224 in words is "twenty-two billion, five hundred twenty-one million, four hundred fifty-one thousand, two hundred twenty-four".