221011440432 has 40 divisors (see below), whose sum is σ = 572302440240. Its totient is φ = 73495484160.

The previous prime is 221011440427. The next prime is 221011440451. The reversal of 221011440432 is 234044110122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5448207 + ... + 5488622.

It is an arithmetic number, because the mean of its divisors is an integer number (14307561006).

Almost surely, 2^221011440432 is an apocalyptic number.

It is an amenable number.

221011440432 is an abundant number, since it is smaller than the sum of its proper divisors (351290999808).

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

221011440432 is a wasteful number, since it uses less digits than its factorization.

221011440432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10937261 (or 10937255 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 221011440432 its reverse (234044110122), we get a palindrome (455055550554).

The spelling of 221011440432 in words is "two hundred twenty-one billion, eleven million, four hundred forty thousand, four hundred thirty-two".