221233242320 has 20 divisors (see below), whose sum is σ = 514367288580. Its totient is φ = 88493296896.

The previous prime is 221233242313. The next prime is 221233242341. The reversal of 221233242320 is 23242332122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 131487462544 + 89745779776 = 362612^2 + 299576^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 221233242320.

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, 1382707685 + ... + 1382707844.

It is an arithmetic number, because the mean of its divisors is an integer number (25718364429).

Almost surely, 2^221233242320 is an apocalyptic number.

221233242320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221233242320 is an abundant number, since it is smaller than the sum of its proper divisors (293134046260).

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

221233242320 is a wasteful number, since it uses less digits than its factorization.

221233242320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2765415542 (or 2765415536 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 221233242320 its reverse (23242332122), we get a palindrome (244475574442).

The spelling of 221233242320 in words is "two hundred twenty-one billion, two hundred thirty-three million, two hundred forty-two thousand, three hundred twenty".