221013320 has 64 divisors (see below), whose sum is σ = 571060800. Its totient is φ = 76135680.

The previous prime is 221013319. The next prime is 221013341. The reversal of 221013320 is 23310122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221013295 and 221013304.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4859 + ... + 21578.

It is an arithmetic number, because the mean of its divisors is an integer number (8922825).

Almost surely, 2^221013320 is an apocalyptic number.

221013320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221013320 is an abundant number, since it is smaller than the sum of its proper divisors (350047480).

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

221013320 is a wasteful number, since it uses less digits than its factorization.

221013320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26478 (or 26474 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 221013320 is about 14866.5167406491. The cubic root of 221013320 is about 604.6065059588.

Adding to 221013320 its reverse (23310122), we get a palindrome (244323442).

The spelling of 221013320 in words is "two hundred twenty-one million, thirteen thousand, three hundred twenty".