22215399025806 has 192 divisors, whose sum is σ = 60243372933120. Its totient is φ = 5773393765440.

The previous prime is 22215399025769. The next prime is 22215399025849. The reversal of 22215399025806 is 60852099351222.

It is a happy number.

22215399025806 is a `hidden beast` number, since 2 + 2 + 2 + 1 + 53 + 9 + 9 + 0 + 2 + 580 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8246665 + ... + 10603691.

It is an arithmetic number, because the mean of its divisors is an integer number (313767567360).

Almost surely, 2^{22215399025806} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22215399025806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30121686466560).

22215399025806 is an abundant number, since it is smaller than the sum of its proper divisors (38027973907314).

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

22215399025806 is a wasteful number, since it uses less digits than its factorization.

22215399025806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2357219 (or 2357216 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 22215399025806 in words is "twenty-two trillion, two hundred fifteen billion, three hundred ninety-nine million, twenty-five thousand, eight hundred six".