22521231656 has 32 divisors (see below), whose sum is σ = 52647036480. Its totient is φ = 8774505600.

The previous prime is 22521231641. The next prime is 22521231673. The reversal of 22521231656 is 65613212522.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18279605 + ... + 18280836.

It is an arithmetic number, because the mean of its divisors is an integer number (1645219890).

Almost surely, 2^22521231656 is an apocalyptic number.

It is an amenable number.

22521231656 is an abundant number, since it is smaller than the sum of its proper divisors (30125804824).

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

22521231656 is a wasteful number, since it uses less digits than its factorization.

22521231656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36560465 (or 36560461 counting only the distinct ones).

The product of its digits is 43200, while the sum is 35.

The spelling of 22521231656 in words is "twenty-two billion, five hundred twenty-one million, two hundred thirty-one thousand, six hundred fifty-six".