221814321892 has 24 divisors (see below), whose sum is σ = 397696481280. Its totient is φ = 108187487040.

The previous prime is 221814321889. The next prime is 221814321977. The reversal of 221814321892 is 298123418122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1179709 + ... + 1354747.

It is an arithmetic number, because the mean of its divisors is an integer number (16570686720).

Almost surely, 2^221814321892 is an apocalyptic number.

It is an amenable number.

221814321892 is a deficient number, since it is larger than the sum of its proper divisors (175882159388).

221814321892 is a wasteful number, since it uses less digits than its factorization.

221814321892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182811 (or 182809 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The spelling of 221814321892 in words is "two hundred twenty-one billion, eight hundred fourteen million, three hundred twenty-one thousand, eight hundred ninety-two".