226552686255621 has 48 divisors (see below), whose sum is σ = 360561422632320. Its totient is φ = 135932108400000.

The previous prime is 226552686255473. The next prime is 226552686255683. The reversal of 226552686255621 is 126552686255622.

It is a happy number.

226552686255621 is a `hidden beast` number, since 2 + 2 + 6 + 5 + 5 + 2 + 6 + 8 + 62 + 5 + 562 + 1 = 666.

It is not a de Polignac number, because 226552686255621 - 2¹⁷ = 226552686124549 is a prime.

It is a super-2 number, since 2×226552686255621² (a number of 30 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (226552686255691) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103193296 + ... + 105365846.

It is an arithmetic number, because the mean of its divisors is an integer number (7511696304840).

Almost surely, 2^{226552686255621} is an apocalyptic number.

It is an amenable number.

226552686255621 is a deficient number, since it is larger than the sum of its proper divisors (134008736376699).

226552686255621 is a wasteful number, since it uses less digits than its factorization.

226552686255621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183098 (or 2183095 counting only the distinct ones).

The product of its digits is 207360000, while the sum is 63.

Subtracting from 226552686255621 its reverse (126552686255622), we obtain a palindrome (99999999999999).

The spelling of 226552686255621 in words is "two hundred twenty-six trillion, five hundred fifty-two billion, six hundred eighty-six million, two hundred fifty-five thousand, six hundred twenty-one".