164355251 has 2 divisors, whose sum is σ = 164355252. Its totient is φ = 164355250.

The previous prime is 164355239. The next prime is 164355253. The reversal of 164355251 is 152553461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164355251 is a prime.

Together with 164355253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164355253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82177625 + 82177626.

It is an arithmetic number, because the mean of its divisors is an integer number (82177626).

Almost surely, 2^164355251 is an apocalyptic number.

164355251 is a deficient number, since it is larger than the sum of its proper divisors (1).

164355251 is an equidigital number, since it uses as much as digits as its factorization.

164355251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 32.

The square root of 164355251 is about 12820.1111929655. Note that the first 4 decimals coincide. The cubic root of 164355251 is about 547.7653138879.

The spelling of 164355251 in words is "one hundred sixty-four million, three hundred fifty-five thousand, two hundred fifty-one".