165135553 has 8 divisors (see below), whose sum is σ = 181464480. Its totient is φ = 149026080.

The previous prime is 165135547. The next prime is 165135559. The reversal of 165135553 is 355531561.

165135553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (165135547) and next prime (165135559).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165135553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165135559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53283 + ... + 56296.

It is an arithmetic number, because the mean of its divisors is an integer number (22683060).

Almost surely, 2^165135553 is an apocalyptic number.

It is an amenable number.

165135553 is a deficient number, since it is larger than the sum of its proper divisors (16328927).

165135553 is a wasteful number, since it uses less digits than its factorization.

165135553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109727.

The product of its digits is 33750, while the sum is 34.

The square root of 165135553 is about 12850.5078887957. The cubic root of 165135553 is about 548.6308125114.

The spelling of 165135553 in words is "one hundred sixty-five million, one hundred thirty-five thousand, five hundred fifty-three".