164225447 has 2 divisors, whose sum is σ = 164225448. Its totient is φ = 164225446.

The previous prime is 164225443. The next prime is 164225449. The reversal of 164225447 is 744522461.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (744522461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164225447 - 2² = 164225443 is a prime.

Together with 164225449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164225443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82112723 + 82112724.

It is an arithmetic number, because the mean of its divisors is an integer number (82112724).

Almost surely, 2^164225447 is an apocalyptic number.

164225447 is a deficient number, since it is larger than the sum of its proper divisors (1).

164225447 is an equidigital number, since it uses as much as digits as its factorization.

164225447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 35.

The square root of 164225447 is about 12815.0476784131. The cubic root of 164225447 is about 547.6210717562.

The spelling of 164225447 in words is "one hundred sixty-four million, two hundred twenty-five thousand, four hundred forty-seven".