221164931795 has 16 divisors (see below), whose sum is σ = 266113305120. Its totient is φ = 176455666944.

The previous prime is 221164931723. The next prime is 221164931837. The reversal of 221164931795 is 597139461122.

It is a cyclic number.

It is not a de Polignac number, because 221164931795 - 2²⁶ = 221097822931 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2750279 + ... + 2829551.

It is an arithmetic number, because the mean of its divisors is an integer number (16632081570).

Almost surely, 2^221164931795 is an apocalyptic number.

221164931795 is a deficient number, since it is larger than the sum of its proper divisors (44948373325).

221164931795 is an equidigital number, since it uses as much as digits as its factorization.

221164931795 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80774.

The product of its digits is 816480, while the sum is 50.

The spelling of 221164931795 in words is "two hundred twenty-one billion, one hundred sixty-four million, nine hundred thirty-one thousand, seven hundred ninety-five".