165151555 has 8 divisors (see below), whose sum is σ = 198898992. Its totient is φ = 131643168.

The previous prime is 165151543. The next prime is 165151559. The reversal of 165151555 is 555151561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165151555 - 2¹¹ = 165149507 is a prime.

It is a super-2 number, since 2×165151555² = 54550072237836050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165151555.

It is not an unprimeable number, because it can be changed into a prime (165151559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58237 + ... + 61006.

It is an arithmetic number, because the mean of its divisors is an integer number (24862374).

Almost surely, 2^165151555 is an apocalyptic number.

165151555 is a deficient number, since it is larger than the sum of its proper divisors (33747437).

165151555 is a wasteful number, since it uses less digits than its factorization.

165151555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119525.

The product of its digits is 18750, while the sum is 34.

The square root of 165151555 is about 12851.1304950187. The cubic root of 165151555 is about 548.6485331183.

The spelling of 165151555 in words is "one hundred sixty-five million, one hundred fifty-one thousand, five hundred fifty-five".