164332261 has 2 divisors, whose sum is σ = 164332262. Its totient is φ = 164332260.

The previous prime is 164332247. The next prime is 164332279. The reversal of 164332261 is 162233461.

164332261 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 can be written as a sum of positive squares in only one way, i.e., 135280161 + 29052100 = 11631^2 + 5390^2 .

It is a cyclic number.

It is not a de Polignac number, because 164332261 - 2⁵ = 164332229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164332211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82166130 + 82166131.

It is an arithmetic number, because the mean of its divisors is an integer number (82166131).

Almost surely, 2^164332261 is an apocalyptic number.

It is an amenable number.

164332261 is a deficient number, since it is larger than the sum of its proper divisors (1).

164332261 is an equidigital number, since it uses as much as digits as its factorization.

164332261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 164332261 is about 12819.2145235190. The cubic root of 164332261 is about 547.7397722402.

The spelling of 164332261 in words is "one hundred sixty-four million, three hundred thirty-two thousand, two hundred sixty-one".