165223807 has 16 divisors (see below), whose sum is σ = 192844800. Its totient is φ = 138630240.

The previous prime is 165223801. The next prime is 165223811. The reversal of 165223807 is 708322561.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-165223807 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 (165223801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101244 + ... + 102862.

It is an arithmetic number, because the mean of its divisors is an integer number (12052800).

Almost surely, 2^165223807 is an apocalyptic number.

165223807 is a deficient number, since it is larger than the sum of its proper divisors (27620993).

165223807 is a wasteful number, since it uses less digits than its factorization.

165223807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 165223807 is about 12853.9413021843. The cubic root of 165223807 is about 548.7285306987.

The spelling of 165223807 in words is "one hundred sixty-five million, two hundred twenty-three thousand, eight hundred seven".