221333140 has 48 divisors (see below), whose sum is σ = 554303232. Its totient is φ = 72585216.

The previous prime is 221333089. The next prime is 221333143. The reversal of 221333140 is 41333122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221333143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31149 + ... + 37588.

It is an arithmetic number, because the mean of its divisors is an integer number (11547984).

Almost surely, 2^221333140 is an apocalyptic number.

221333140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221333140 is an abundant number, since it is smaller than the sum of its proper divisors (332970092).

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

221333140 is a wasteful number, since it uses less digits than its factorization.

221333140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68776 (or 68774 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 221333140 is about 14877.2692386741. The cubic root of 221333140 is about 604.8979997885.

Adding to 221333140 its reverse (41333122), we get a palindrome (262666262).

It can be divided in two parts, 2213 and 33140, that added together give a palindrome (35353).

The spelling of 221333140 in words is "two hundred twenty-one million, three hundred thirty-three thousand, one hundred forty".