221947332804 has 36 divisors (see below), whose sum is σ = 561048074496. Its totient is φ = 73980527088.

The previous prime is 221947332799. The next prime is 221947332823. The reversal of 221947332804 is 408233749122.

221947332804 is a `hidden beast` number, since 221 + 94 + 7 + 332 + 8 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 221947332804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2299297 + ... + 2393879.

It is an arithmetic number, because the mean of its divisors is an integer number (15584668736).

Almost surely, 2^221947332804 is an apocalyptic number.

It is an amenable number.

221947332804 is an abundant number, since it is smaller than the sum of its proper divisors (339100741692).

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

221947332804 is a wasteful number, since it uses less digits than its factorization.

221947332804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159776 (or 159771 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 221947332804 in words is "two hundred twenty-one billion, nine hundred forty-seven million, three hundred thirty-two thousand, eight hundred four".