221005415166 has 8 divisors (see below), whose sum is σ = 442010830344. Its totient is φ = 73668471720.

The previous prime is 221005415153. The next prime is 221005415201. The reversal of 221005415166 is 661514500122.

It is a sphenic number, since it is the product of 3 distinct primes.

221005415166 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18417117925 + ... + 18417117936.

It is an arithmetic number, because the mean of its divisors is an integer number (55251353793).

Almost surely, 2^221005415166 is an apocalyptic number.

221005415166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221005415166 is a wasteful number, since it uses less digits than its factorization.

221005415166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36834235866.

The product of its (nonzero) digits is 14400, while the sum is 33.

Adding to 221005415166 its reverse (661514500122), we get a palindrome (882519915288).

The spelling of 221005415166 in words is "two hundred twenty-one billion, five million, four hundred fifteen thousand, one hundred sixty-six".