22515220522452 has 24 divisors (see below), whose sum is σ = 60040588060096. Its totient is φ = 6432920149248.

The previous prime is 22515220522451. The next prime is 22515220522463. The reversal of 22515220522452 is 25422502251522.

It is a self number, because there is not a number n which added to its sum of digits gives 22515220522452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22515220522451) 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, 134019169693 + ... + 134019169860.

Almost surely, 2^{22515220522452} is an apocalyptic number.

It is an amenable number.

22515220522452 is an abundant number, since it is smaller than the sum of its proper divisors (37525367537644).

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

22515220522452 is a wasteful number, since it uses less digits than its factorization.

22515220522452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268038339567 (or 268038339565 counting only the distinct ones).

The product of its (nonzero) digits is 320000, while the sum is 39.

Adding to 22515220522452 its reverse (25422502251522), we get a palindrome (47937722773974).

The spelling of 22515220522452 in words is "twenty-two trillion, five hundred fifteen billion, two hundred twenty million, five hundred twenty-two thousand, four hundred fifty-two".