221363243166 has 32 divisors (see below), whose sum is σ = 476812385280. Its totient is φ = 68107479264.

The previous prime is 221363243141. The next prime is 221363243173. The reversal of 221363243166 is 661342363122.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1294075 + ... + 1455113.

It is an arithmetic number, because the mean of its divisors is an integer number (14900387040).

Almost surely, 2^221363243166 is an apocalyptic number.

221363243166 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

221363243166 is an abundant number, since it is smaller than the sum of its proper divisors (255449142114).

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

221363243166 is a wasteful number, since it uses less digits than its factorization.

221363243166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178680.

The product of its digits is 186624, while the sum is 39.

The spelling of 221363243166 in words is "two hundred twenty-one billion, three hundred sixty-three million, two hundred forty-three thousand, one hundred sixty-six".