221432232 has 64 divisors (see below), whose sum is σ = 665971200. Its totient is φ = 59935680.

The previous prime is 221432231. The next prime is 221432243. The reversal of 221432232 is 232234122.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 221432199 and 221432208.

It is not an unprimeable number, because it can be changed into a prime (221432231) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 31494 + ... + 37877.

It is an arithmetic number, because the mean of its divisors is an integer number (10405800).

Almost surely, 2^221432232 is an apocalyptic number.

It is an amenable number.

221432232 is an abundant number, since it is smaller than the sum of its proper divisors (444538968).

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

221432232 is a wasteful number, since it uses less digits than its factorization.

221432232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69406 (or 69402 counting only the distinct ones).

The product of its digits is 1152, while the sum is 21.

The square root of 221432232 is about 14880.5991814846. The cubic root of 221432232 is about 604.9882583155.

Adding to 221432232 its reverse (232234122), we get a palindrome (453666354).

The spelling of 221432232 in words is "two hundred twenty-one million, four hundred thirty-two thousand, two hundred thirty-two".