221181681622 has 48 divisors (see below), whose sum is σ = 392036843520. Its totient is φ = 93219104880.

The previous prime is 221181681613. The next prime is 221181681629. The reversal of 221181681622 is 226186181122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221181681629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 295638 + ... + 727849.

It is an arithmetic number, because the mean of its divisors is an integer number (8167434240).

Almost surely, 2^221181681622 is an apocalyptic number.

221181681622 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221181681622 is a deficient number, since it is larger than the sum of its proper divisors (170855161898).

221181681622 is a wasteful number, since it uses less digits than its factorization.

221181681622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023577 (or 1023566 counting only the distinct ones).

The product of its digits is 36864, while the sum is 40.

The spelling of 221181681622 in words is "two hundred twenty-one billion, one hundred eighty-one million, six hundred eighty-one thousand, six hundred twenty-two".