164531243 has 2 divisors, whose sum is σ = 164531244. Its totient is φ = 164531242.

The previous prime is 164531221. The next prime is 164531309. The reversal of 164531243 is 342135461.

164531243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (342135461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 164531243 - 2⁶ = 164531179 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164521243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82265621 + 82265622.

It is an arithmetic number, because the mean of its divisors is an integer number (82265622).

Almost surely, 2^164531243 is an apocalyptic number.

164531243 is a deficient number, since it is larger than the sum of its proper divisors (1).

164531243 is an equidigital number, since it uses as much as digits as its factorization.

164531243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 29.

The square root of 164531243 is about 12826.9732595028. The cubic root of 164531243 is about 547.9607602837.

The spelling of 164531243 in words is "one hundred sixty-four million, five hundred thirty-one thousand, two hundred forty-three".