22512217236 has 48 divisors (see below), whose sum is σ = 55142062080. Its totient is φ = 7138913760.

The previous prime is 22512217213. The next prime is 22512217249. The reversal of 22512217236 is 63271221522.

It is a junction number, because it is equal to n+sod(n) for n = 22512217197 and 22512217206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 490906 + ... + 534801.

It is an arithmetic number, because the mean of its divisors is an integer number (1148792960).

Almost surely, 2^22512217236 is an apocalyptic number.

It is an amenable number.

22512217236 is an abundant number, since it is smaller than the sum of its proper divisors (32629844844).

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

22512217236 is a wasteful number, since it uses less digits than its factorization.

22512217236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025804 (or 1025802 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

Adding to 22512217236 its reverse (63271221522), we get a palindrome (85783438758).

The spelling of 22512217236 in words is "twenty-two billion, five hundred twelve million, two hundred seventeen thousand, two hundred thirty-six".