221233260 has 48 divisors (see below), whose sum is σ = 622944000. Its totient is φ = 58663104.

The previous prime is 221233241. The next prime is 221233273. The reversal of 221233260 is 62332122.

221233260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 441 + ... + 21039.

It is an arithmetic number, because the mean of its divisors is an integer number (12978000).

Almost surely, 2^221233260 is an apocalyptic number.

221233260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221233260 is an abundant number, since it is smaller than the sum of its proper divisors (401710740).

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

221233260 is a wasteful number, since it uses less digits than its factorization.

221233260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20790 (or 20788 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 221233260 is about 14873.9120610551. The cubic root of 221233260 is about 604.8069962413.

Adding to 221233260 its reverse (62332122), we get a palindrome (283565382).

The spelling of 221233260 in words is "two hundred twenty-one million, two hundred thirty-three thousand, two hundred sixty".