221403223140 has 96 divisors (see below), whose sum is σ = 681448965120. Its totient is φ = 53263766400.

The previous prime is 221403223103. The next prime is 221403223157. The reversal of 221403223140 is 41322304122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221403223140.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1193920 + ... + 1366839.

It is an arithmetic number, because the mean of its divisors is an integer number (7098426720).

Almost surely, 2^221403223140 is an apocalyptic number.

221403223140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221403223140 is an abundant number, since it is smaller than the sum of its proper divisors (460045741980).

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

221403223140 is a wasteful number, since it uses less digits than its factorization.

221403223140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560913 (or 2560911 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 221403223140 its reverse (41322304122), we get a palindrome (262725527262).

The spelling of 221403223140 in words is "two hundred twenty-one billion, four hundred three million, two hundred twenty-three thousand, one hundred forty".