21552322286 has 12 divisors (see below), whose sum is σ = 35534614416. Its totient is φ = 9796510020.

The previous prime is 21552322157. The next prime is 21552322291. The reversal of 21552322286 is 68222325512.

It is a super-3 number, since 3×21552322286³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44529350 + ... + 44529833.

It is an arithmetic number, because the mean of its divisors is an integer number (2961217868).

Almost surely, 2^21552322286 is an apocalyptic number.

21552322286 is a deficient number, since it is larger than the sum of its proper divisors (13982292130).

21552322286 is a wasteful number, since it uses less digits than its factorization.

21552322286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89059207 (or 89059196 counting only the distinct ones).

The product of its digits is 115200, while the sum is 38.

Adding to 21552322286 its reverse (68222325512), we get a palindrome (89774647798).

The spelling of 21552322286 in words is "twenty-one billion, five hundred fifty-two million, three hundred twenty-two thousand, two hundred eighty-six".