221232432232 has 32 divisors (see below), whose sum is σ = 489362065920. Its totient is φ = 91755385920.

The previous prime is 221232432217. The next prime is 221232432241. The reversal of 221232432232 is 232234232122.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 221232432232.

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, 63717283 + ... + 63720754.

It is an arithmetic number, because the mean of its divisors is an integer number (15292564560).

Almost surely, 2^221232432232 is an apocalyptic number.

It is an amenable number.

221232432232 is an abundant number, since it is smaller than the sum of its proper divisors (268129633688).

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

221232432232 is a wasteful number, since it uses less digits than its factorization.

221232432232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127438081 (or 127438077 counting only the distinct ones).

The product of its digits is 13824, while the sum is 28.

Adding to 221232432232 its reverse (232234232122), we get a palindrome (453466664354).

The spelling of 221232432232 in words is "two hundred twenty-one billion, two hundred thirty-two million, four hundred thirty-two thousand, two hundred thirty-two".