165220701 has 4 divisors (see below), whose sum is σ = 220294272. Its totient is φ = 110147132.

The previous prime is 165220691. The next prime is 165220703. The reversal of 165220701 is 107022561.

165220701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165220701 - 2⁹ = 165220189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165220703) 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, 27536781 + ... + 27536786.

It is an arithmetic number, because the mean of its divisors is an integer number (55073568).

Almost surely, 2^165220701 is an apocalyptic number.

It is an amenable number.

165220701 is a deficient number, since it is larger than the sum of its proper divisors (55073571).

165220701 is an equidigital number, since it uses as much as digits as its factorization.

165220701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55073570.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 165220701 is about 12853.8204826425. The cubic root of 165220701 is about 548.7250922082.

The spelling of 165220701 in words is "one hundred sixty-five million, two hundred twenty thousand, seven hundred one".