22051443252 has 12 divisors (see below), whose sum is σ = 51453367616. Its totient is φ = 7350481080.

The previous prime is 22051443241. The next prime is 22051443259. The reversal of 22051443252 is 25234415022.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×22051443252² (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 (22051443259) 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, 918810124 + ... + 918810147.

Almost surely, 2^22051443252 is an apocalyptic number.

It is an amenable number.

22051443252 is an abundant number, since it is smaller than the sum of its proper divisors (29401924364).

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

22051443252 is a wasteful number, since it uses less digits than its factorization.

22051443252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837620278 (or 1837620276 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 22051443252 its reverse (25234415022), we get a palindrome (47285858274).

The spelling of 22051443252 in words is "twenty-two billion, fifty-one million, four hundred forty-three thousand, two hundred fifty-two".