221797457830 has 32 divisors (see below), whose sum is σ = 432520409664. Its totient is φ = 81404052096.

The previous prime is 221797457821. The next prime is 221797457837. The reversal of 221797457830 is 38754797122.

221797457830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×221797457830³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221797457837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5086477 + ... + 5129896.

It is an arithmetic number, because the mean of its divisors is an integer number (13516262802).

Almost surely, 2^221797457830 is an apocalyptic number.

221797457830 is a deficient number, since it is larger than the sum of its proper divisors (210722951834).

221797457830 is a wasteful number, since it uses less digits than its factorization.

221797457830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10216560.

The product of its (nonzero) digits is 5927040, while the sum is 55.

The spelling of 221797457830 in words is "two hundred twenty-one billion, seven hundred ninety-seven million, four hundred fifty-seven thousand, eight hundred thirty".