221983285793 has 4 divisors (see below), whose sum is σ = 222186754608. Its totient is φ = 221779816980.

The previous prime is 221983285747. The next prime is 221983285813. The reversal of 221983285793 is 397582389122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221983285793 - 2¹² = 221983281697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221983284793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101732771 + ... + 101734952.

It is an arithmetic number, because the mean of its divisors is an integer number (55546688652).

Almost surely, 2^221983285793 is an apocalyptic number.

It is an amenable number.

221983285793 is a deficient number, since it is larger than the sum of its proper divisors (203468815).

221983285793 is a wasteful number, since it uses less digits than its factorization.

221983285793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203468814.

The product of its digits is 13063680, while the sum is 59.

The spelling of 221983285793 in words is "two hundred twenty-one billion, nine hundred eighty-three million, two hundred eighty-five thousand, seven hundred ninety-three".