165057011 has 4 divisors (see below), whose sum is σ = 188636592. Its totient is φ = 141477432.

The previous prime is 165057007. The next prime is 165057031. The reversal of 165057011 is 110750561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110750561 = 4751 ⋅23311.

It is a cyclic number.

It is not a de Polignac number, because 165057011 - 2² = 165057007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165057001) 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, 11789780 + ... + 11789793.

It is an arithmetic number, because the mean of its divisors is an integer number (47159148).

Almost surely, 2^165057011 is an apocalyptic number.

165057011 is a deficient number, since it is larger than the sum of its proper divisors (23579581).

165057011 is an equidigital number, since it uses as much as digits as its factorization.

165057011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23579580.

The product of its (nonzero) digits is 1050, while the sum is 26.

The square root of 165057011 is about 12847.4515371727. The cubic root of 165057011 is about 548.5438185360.

The spelling of 165057011 in words is "one hundred sixty-five million, fifty-seven thousand, eleven".