164171551 has 2 divisors, whose sum is σ = 164171552. Its totient is φ = 164171550.

The previous prime is 164171543. The next prime is 164171563. The reversal of 164171551 is 155171461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164171551 - 2³ = 164171543 is a prime.

It is equal to p_9195214 and since 164171551 and 9195214 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164171531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82085775 + 82085776.

It is an arithmetic number, because the mean of its divisors is an integer number (82085776).

Almost surely, 2^164171551 is an apocalyptic number.

164171551 is a deficient number, since it is larger than the sum of its proper divisors (1).

164171551 is an equidigital number, since it uses as much as digits as its factorization.

164171551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4200, while the sum is 31.

The square root of 164171551 is about 12812.9446654545. The cubic root of 164171551 is about 547.5611585593.

The spelling of 164171551 in words is "one hundred sixty-four million, one hundred seventy-one thousand, five hundred fifty-one".