165314551 has 2 divisors, whose sum is σ = 165314552. Its totient is φ = 165314550.

The previous prime is 165314543. The next prime is 165314561. The reversal of 165314551 is 155413561.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (155413561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165314551 - 2³ = 165314543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165314561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82657275 + 82657276.

It is an arithmetic number, because the mean of its divisors is an integer number (82657276).

Almost surely, 2^165314551 is an apocalyptic number.

165314551 is a deficient number, since it is larger than the sum of its proper divisors (1).

165314551 is an equidigital number, since it uses as much as digits as its factorization.

165314551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 31.

The square root of 165314551 is about 12857.4706299490. The cubic root of 165314551 is about 548.8289696318.

It can be divided in two parts, 165 and 314551, that multiplied together give a palindrome (51900915).

The spelling of 165314551 in words is "one hundred sixty-five million, three hundred fourteen thousand, five hundred fifty-one".