165220534 has 8 divisors (see below), whose sum is σ = 253594440. Its totient is φ = 80689056.

The previous prime is 165220507. The next prime is 165220537. The reversal of 165220534 is 435022561.

165220534 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165220537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960499 + ... + 960670.

It is an arithmetic number, because the mean of its divisors is an integer number (31699305).

Almost surely, 2^165220534 is an apocalyptic number.

165220534 is a deficient number, since it is larger than the sum of its proper divisors (88373906).

165220534 is a wasteful number, since it uses less digits than its factorization.

165220534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921214.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 165220534 is about 12853.8139865178. The cubic root of 165220534 is about 548.7249073300.

The spelling of 165220534 in words is "one hundred sixty-five million, two hundred twenty thousand, five hundred thirty-four".