165251455 has 16 divisors (see below), whose sum is σ = 210278880. Its totient is φ = 124319232.

The previous prime is 165251447. The next prime is 165251459. The reversal of 165251455 is 554152561.

It is a cyclic number.

It is not a de Polignac number, because 165251455 - 2³ = 165251447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165251455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165251459) 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 in 15 ways as a sum of consecutive naturals, for example, 6667 + ... + 19363.

It is an arithmetic number, because the mean of its divisors is an integer number (13142430).

Almost surely, 2^165251455 is an apocalyptic number.

165251455 is a deficient number, since it is larger than the sum of its proper divisors (45027425).

165251455 is a wasteful number, since it uses less digits than its factorization.

165251455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12858.

The product of its digits is 30000, while the sum is 34.

The square root of 165251455 is about 12855.0167249988. The cubic root of 165251455 is about 548.7591364581.

The spelling of 165251455 in words is "one hundred sixty-five million, two hundred fifty-one thousand, four hundred fifty-five".