164122221 has 8 divisors (see below), whose sum is σ = 224167104. Its totient is φ = 106746080.

The previous prime is 164122213. The next prime is 164122229. The reversal of 164122221 is 122221461.

164122221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (164122213) and next prime (164122229).

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 164122221 - 2³ = 164122213 is a prime.

It is a super-2 number, since 2×164122221² = 53872206851945682, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164122229) 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, 667041 + ... + 667286.

It is an arithmetic number, because the mean of its divisors is an integer number (28020888).

Almost surely, 2^164122221 is an apocalyptic number.

It is an amenable number.

164122221 is a deficient number, since it is larger than the sum of its proper divisors (60044883).

164122221 is a wasteful number, since it uses less digits than its factorization.

164122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334371.

The product of its digits is 384, while the sum is 21.

The square root of 164122221 is about 12811.0195144649. The cubic root of 164122221 is about 547.5063096373.

Adding to 164122221 its reverse (122221461), we get a palindrome (286343682).

The spelling of 164122221 in words is "one hundred sixty-four million, one hundred twenty-two thousand, two hundred twenty-one".