223856221356 has 36 divisors (see below), whose sum is σ = 565925566752. Its totient is φ = 74609933664.

The previous prime is 223856221319. The next prime is 223856221489. The reversal of 223856221356 is 653122658322.

223856221356 is a `hidden beast` number, since 2 + 2 + 3 + 8 + 5 + 622 + 13 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×223856221356² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54036 + ... + 671291.

It is an arithmetic number, because the mean of its divisors is an integer number (15720154632).

Almost surely, 2^223856221356 is an apocalyptic number.

It is an amenable number.

223856221356 is an abundant number, since it is smaller than the sum of its proper divisors (342069345396).

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

223856221356 is a wasteful number, since it uses less digits than its factorization.

223856221356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733910 (or 733905 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

Adding to 223856221356 its reverse (653122658322), we get a palindrome (876978879678).

The spelling of 223856221356 in words is "two hundred twenty-three billion, eight hundred fifty-six million, two hundred twenty-one thousand, three hundred fifty-six".