221232432223240 has 32 divisors (see below), whose sum is σ = 527053735592280. Its totient is φ = 83287503895552.

The previous prime is 221232432223219. The next prime is 221232432223343. The reversal of 221232432223240 is 42322234232122.

It can be written as a sum of positive squares in 4 ways, for example, as 221189531043364 + 42901179876 = 14872442^2 + 207126^2 .

It is a super-3 number, since 3×221232432223240³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 221232432223196 and 221232432223205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162670905367 + ... + 162670906726.

Almost surely, 2^{221232432223240} is an apocalyptic number.

221232432223240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221232432223240 is an abundant number, since it is smaller than the sum of its proper divisors (305821303369040).

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

221232432223240 is a wasteful number, since it uses less digits than its factorization.

221232432223240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325341812121 (or 325341812117 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 221232432223240 its reverse (42322234232122), we get a palindrome (263554666455362).

The spelling of 221232432223240 in words is "two hundred twenty-one trillion, two hundred thirty-two billion, four hundred thirty-two million, two hundred twenty-three thousand, two hundred forty".