221442232 has 32 divisors (see below), whose sum is σ = 453700080. Its totient is φ = 100488960.

The previous prime is 221442227. The next prime is 221442253. The reversal of 221442232 is 232244122.

221442232 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×221442232³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

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, 62788 + ... + 66220.

Almost surely, 2^221442232 is an apocalyptic number.

221442232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221442232 is an abundant number, since it is smaller than the sum of its proper divisors (232257848).

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

221442232 is a wasteful number, since it uses less digits than its factorization.

221442232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4183 (or 4179 counting only the distinct ones).

The product of its digits is 1536, while the sum is 22.

The square root of 221442232 is about 14880.9351856663. The cubic root of 221442232 is about 604.9973653780.

Adding to 221442232 its reverse (232244122), we get a palindrome (453686354).

The spelling of 221442232 in words is "two hundred twenty-one million, four hundred forty-two thousand, two hundred thirty-two".