164383832221 has 4 divisors (see below), whose sum is σ = 187867236832. Its totient is φ = 140900427612.

The previous prime is 164383832159. The next prime is 164383832231. The reversal of 164383832221 is 122238383461.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122238383461 = 131 ⋅933117431.

It is a de Polignac number, because none of the positive numbers 2^k-164383832221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164383832231) 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, 11741702295 + ... + 11741702308.

It is an arithmetic number, because the mean of its divisors is an integer number (46966809208).

Almost surely, 2^164383832221 is an apocalyptic number.

It is an amenable number.

164383832221 is a deficient number, since it is larger than the sum of its proper divisors (23483404611).

164383832221 is an equidigital number, since it uses as much as digits as its factorization.

164383832221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23483404610.

The product of its digits is 331776, while the sum is 43.

The spelling of 164383832221 in words is "one hundred sixty-four billion, three hundred eighty-three million, eight hundred thirty-two thousand, two hundred twenty-one".