165422811 has 4 divisors (see below), whose sum is σ = 220563752. Its totient is φ = 110281872.

The previous prime is 165422791. The next prime is 165422813. The reversal of 165422811 is 118224561.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 165422811 - 2⁵ = 165422779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165422813) 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, 27570466 + ... + 27570471.

It is an arithmetic number, because the mean of its divisors is an integer number (55140938).

Almost surely, 2^165422811 is an apocalyptic number.

165422811 is a deficient number, since it is larger than the sum of its proper divisors (55140941).

165422811 is an equidigital number, since it uses as much as digits as its factorization.

165422811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55140940.

The product of its digits is 3840, while the sum is 30.

The square root of 165422811 is about 12861.6799447040. The cubic root of 165422811 is about 548.9487478739.

The spelling of 165422811 in words is "one hundred sixty-five million, four hundred twenty-two thousand, eight hundred eleven".