165115355 has 4 divisors (see below), whose sum is σ = 198138432. Its totient is φ = 132092280.

The previous prime is 165115351. The next prime is 165115361. The reversal of 165115355 is 553511561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553511561 = 409 ⋅1353329.

It is not a de Polignac number, because 165115355 - 2² = 165115351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165115351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16511531 + ... + 16511540.

It is an arithmetic number, because the mean of its divisors is an integer number (49534608).

Almost surely, 2^165115355 is an apocalyptic number.

165115355 is a deficient number, since it is larger than the sum of its proper divisors (33023077).

165115355 is an equidigital number, since it uses as much as digits as its factorization.

165115355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33023076.

The product of its digits is 11250, while the sum is 32.

The square root of 165115355 is about 12849.7219814282. The cubic root of 165115355 is about 548.6084436215.

The spelling of 165115355 in words is "one hundred sixty-five million, one hundred fifteen thousand, three hundred fifty-five".