164201551 has 2 divisors, whose sum is σ = 164201552. Its totient is φ = 164201550.

The previous prime is 164201549. The next prime is 164201573. The reversal of 164201551 is 155102461.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164201551 - 2¹ = 164201549 is a prime.

Together with 164201549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164201251) 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, 82100775 + 82100776.

It is an arithmetic number, because the mean of its divisors is an integer number (82100776).

Almost surely, 2^164201551 is an apocalyptic number.

164201551 is a deficient number, since it is larger than the sum of its proper divisors (1).

164201551 is an equidigital number, since it uses as much as digits as its factorization.

164201551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 164201551 is about 12814.1153030555. The cubic root of 164201551 is about 547.5945095148.

It can be divided in two parts, 16420 and 1551, that added together give a palindrome (17971).

The spelling of 164201551 in words is "one hundred sixty-four million, two hundred one thousand, five hundred fifty-one".