221873735641 has 8 divisors (see below), whose sum is σ = 222121512704. Its totient is φ = 221626020240.

The previous prime is 221873735623. The next prime is 221873735651. The reversal of 221873735641 is 146537378122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221873735641 - 2⁵ = 221873735609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221873735651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12961210 + ... + 12978316.

It is an arithmetic number, because the mean of its divisors is an integer number (27765189088).

Almost surely, 2^221873735641 is an apocalyptic number.

It is an amenable number.

221873735641 is a deficient number, since it is larger than the sum of its proper divisors (247777063).

221873735641 is a wasteful number, since it uses less digits than its factorization.

221873735641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30831.

The product of its digits is 1693440, while the sum is 49.

The spelling of 221873735641 in words is "two hundred twenty-one billion, eight hundred seventy-three million, seven hundred thirty-five thousand, six hundred forty-one".