221868556074 has 48 divisors (see below), whose sum is σ = 524722109184. Its totient is φ = 67193726400.

The previous prime is 221868556073. The next prime is 221868556079. The reversal of 221868556074 is 470655868122.

221868556074 is a `hidden beast` number, since 2 + 2 + 1 + 8 + 6 + 8 + 5 + 560 + 74 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221868556074.

It is not an unprimeable number, because it can be changed into a prime (221868556073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15207 + ... + 666309.

It is an arithmetic number, because the mean of its divisors is an integer number (10931710608).

Almost surely, 2^221868556074 is an apocalyptic number.

221868556074 is an abundant number, since it is smaller than the sum of its proper divisors (302853553110).

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

221868556074 is a wasteful number, since it uses less digits than its factorization.

221868556074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652843 (or 652840 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 54.

The spelling of 221868556074 in words is "two hundred twenty-one billion, eight hundred sixty-eight million, five hundred fifty-six thousand, seventy-four".