221601654924 has 72 divisors (see below), whose sum is σ = 589373547840. Its totient is φ = 64596422592.

The previous prime is 221601654893. The next prime is 221601654947. The reversal of 221601654924 is 429456106122.

221601654924 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2837022 + ... + 2914085.

It is an arithmetic number, because the mean of its divisors is an integer number (8185743720).

Almost surely, 2^221601654924 is an apocalyptic number.

It is an amenable number.

221601654924 is an abundant number, since it is smaller than the sum of its proper divisors (367771892916).

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

221601654924 is a wasteful number, since it uses less digits than its factorization.

221601654924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5751159 (or 5751144 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 221601654924 in words is "two hundred twenty-one billion, six hundred one million, six hundred fifty-four thousand, nine hundred twenty-four".