221023132 has 12 divisors (see below), whose sum is σ = 421953336. Its totient is φ = 100465040.

The previous prime is 221023129. The next prime is 221023147. The reversal of 221023132 is 231320122.

221023132 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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2511583 + ... + 2511670.

It is an arithmetic number, because the mean of its divisors is an integer number (35162778).

Almost surely, 2^221023132 is an apocalyptic number.

221023132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221023132 is a deficient number, since it is larger than the sum of its proper divisors (200930204).

221023132 is a wasteful number, since it uses less digits than its factorization.

221023132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5023268 (or 5023266 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221023132 is about 14866.8467403145. The cubic root of 221023132 is about 604.6154530987.

Adding to 221023132 its reverse (231320122), we get a palindrome (452343254).

The spelling of 221023132 in words is "two hundred twenty-one million, twenty-three thousand, one hundred thirty-two".