221224730730 has 32 divisors (see below), whose sum is σ = 539643282048. Its totient is φ = 58026158400.

The previous prime is 221224730717. The next prime is 221224730767. The reversal of 221224730730 is 37037422122.

It is a super-2 number, since 2×221224730730² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221224730691 and 221224730700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60442086 + ... + 60445745.

It is an arithmetic number, because the mean of its divisors is an integer number (16863852564).

Almost surely, 2^221224730730 is an apocalyptic number.

221224730730 is an abundant number, since it is smaller than the sum of its proper divisors (318418551318).

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

221224730730 is a wasteful number, since it uses less digits than its factorization.

221224730730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120887902.

The product of its (nonzero) digits is 28224, while the sum is 33.

The spelling of 221224730730 in words is "two hundred twenty-one billion, two hundred twenty-four million, seven hundred thirty thousand, seven hundred thirty".