221115567772 has 24 divisors (see below), whose sum is σ = 424657457280. Its totient is φ = 99905234160.

The previous prime is 221115567643. The next prime is 221115567773. The reversal of 221115567772 is 277765511122.

It is a super-2 number, since 2×221115567772² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221115567773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15038622 + ... + 15053317.

It is an arithmetic number, because the mean of its divisors is an integer number (17694060720).

Almost surely, 2^221115567772 is an apocalyptic number.

221115567772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221115567772 is a deficient number, since it is larger than the sum of its proper divisors (203541889508).

221115567772 is a wasteful number, since it uses less digits than its factorization.

221115567772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30092121 (or 30092119 counting only the distinct ones).

The product of its digits is 411600, while the sum is 46.

It can be divided in two parts, 221115 and 567772, that added together give a palindrome (788887).

The spelling of 221115567772 in words is "two hundred twenty-one billion, one hundred fifteen million, five hundred sixty-seven thousand, seven hundred seventy-two".