165455207 has 4 divisors (see below), whose sum is σ = 165529536. Its totient is φ = 165380880.

The previous prime is 165455189. The next prime is 165455221. The reversal of 165455207 is 702554561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702554561 = 113 ⋅6217297.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165455207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165452207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33719 + ... + 38312.

It is an arithmetic number, because the mean of its divisors is an integer number (41382384).

Almost surely, 2^165455207 is an apocalyptic number.

165455207 is a deficient number, since it is larger than the sum of its proper divisors (74329).

165455207 is an equidigital number, since it uses as much as digits as its factorization.

165455207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74328.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 165455207 is about 12862.9392830721. The cubic root of 165455207 is about 548.9845804630.

The spelling of 165455207 in words is "one hundred sixty-five million, four hundred fifty-five thousand, two hundred seven".