165164551 has 2 divisors, whose sum is σ = 165164552. Its totient is φ = 165164550.

The previous prime is 165164521. The next prime is 165164557. The reversal of 165164551 is 155461561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165164551 - 2¹³ = 165156359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165164557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82582275 + 82582276.

It is an arithmetic number, because the mean of its divisors is an integer number (82582276).

Almost surely, 2^165164551 is an apocalyptic number.

165164551 is a deficient number, since it is larger than the sum of its proper divisors (1).

165164551 is an equidigital number, since it uses as much as digits as its factorization.

165164551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 34.

The square root of 165164551 is about 12851.6361215216. The cubic root of 165164551 is about 548.6629240401.

The spelling of 165164551 in words is "one hundred sixty-five million, one hundred sixty-four thousand, five hundred fifty-one".