22154217512 has 96 divisors (see below), whose sum is σ = 51824901600. Its totient is φ = 8825072256.

The previous prime is 22154217509. The next prime is 22154217559. The reversal of 22154217512 is 21571245122.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 366683 + ... + 422805.

It is an arithmetic number, because the mean of its divisors is an integer number (539842725).

Almost surely, 2^22154217512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22154217512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25912450800).

22154217512 is an abundant number, since it is smaller than the sum of its proper divisors (29670684088).

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

22154217512 is a wasteful number, since it uses less digits than its factorization.

22154217512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56215 (or 56204 counting only the distinct ones).

The product of its digits is 11200, while the sum is 32.

The spelling of 22154217512 in words is "twenty-two billion, one hundred fifty-four million, two hundred seventeen thousand, five hundred twelve".