165221314655033 has 16 divisors (see below), whose sum is σ = 203349889075200. Its totient is φ = 130724184609216.

The previous prime is 165221314654967. The next prime is 165221314655041. The reversal of 165221314655033 is 330556413122561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165221314655033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165221314655233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32113091 + ... + 36901127.

It is an arithmetic number, because the mean of its divisors is an integer number (12709368067200).

Almost surely, 2^{165221314655033} is an apocalyptic number.

165221314655033 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

165221314655033 is a deficient number, since it is larger than the sum of its proper divisors (38128574420167).

165221314655033 is a wasteful number, since it uses less digits than its factorization.

165221314655033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5167256.

The product of its (nonzero) digits is 1944000, while the sum is 47.

Adding to 165221314655033 its reverse (330556413122561), we get a palindrome (495777727777594).

The spelling of 165221314655033 in words is "one hundred sixty-five trillion, two hundred twenty-one billion, three hundred fourteen million, six hundred fifty-five thousand, thirty-three".