221330333240 has 32 divisors (see below), whose sum is σ = 498028608000. Its totient is φ = 88525847424.

The previous prime is 221330333179. The next prime is 221330333293. The reversal of 221330333240 is 42333033122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396041 + ... + 774279.

It is an arithmetic number, because the mean of its divisors is an integer number (15563394000).

Almost surely, 2^221330333240 is an apocalyptic number.

221330333240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221330333240 is an abundant number, since it is smaller than the sum of its proper divisors (276698274760).

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

221330333240 is a wasteful number, since it uses less digits than its factorization.

221330333240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392879 (or 392875 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 26.

Adding to 221330333240 its reverse (42333033122), we get a palindrome (263663366362).

The spelling of 221330333240 in words is "two hundred twenty-one billion, three hundred thirty million, three hundred thirty-three thousand, two hundred forty".