164345422 has 4 divisors (see below), whose sum is σ = 246518136. Its totient is φ = 82172710.

The previous prime is 164345413. The next prime is 164345429. The reversal of 164345422 is 224543461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224543461 = 5659 ⋅39679.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164345429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41086354 + ... + 41086357.

It is an arithmetic number, because the mean of its divisors is an integer number (61629534).

Almost surely, 2^164345422 is an apocalyptic number.

164345422 is a deficient number, since it is larger than the sum of its proper divisors (82172714).

164345422 is an equidigital number, since it uses as much as digits as its factorization.

164345422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82172713.

The product of its digits is 23040, while the sum is 31.

The square root of 164345422 is about 12819.7278442251. The cubic root of 164345422 is about 547.7543942640.

Adding to 164345422 its reverse (224543461), we get a palindrome (388888883).

The spelling of 164345422 in words is "one hundred sixty-four million, three hundred forty-five thousand, four hundred twenty-two".