221331620232 has 32 divisors (see below), whose sum is σ = 614810056800. Its totient is φ = 73777206672.

The previous prime is 221331620189. The next prime is 221331620267. The reversal of 221331620232 is 232026133122.

221331620232 is a `hidden beast` number, since 2 + 2 + 1 + 3 + 3 + 1 + 620 + 2 + 32 = 666.

221331620232 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221331620232² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 221331620196 and 221331620205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512341498 + ... + 512341929.

It is an arithmetic number, because the mean of its divisors is an integer number (19212814275).

Almost surely, 2^221331620232 is an apocalyptic number.

It is an amenable number.

221331620232 is an abundant number, since it is smaller than the sum of its proper divisors (393478436568).

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

221331620232 is a wasteful number, since it uses less digits than its factorization.

221331620232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024683442 (or 1024683432 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 221331620232 its reverse (232026133122), we get a palindrome (453357753354).

The spelling of 221331620232 in words is "two hundred twenty-one billion, three hundred thirty-one million, six hundred twenty thousand, two hundred thirty-two".