165430331 has 16 divisors (see below), whose sum is σ = 188179200. Its totient is φ = 144100320.

The previous prime is 165430313. The next prime is 165430357. The reversal of 165430331 is 133034561.

165430331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 165430331 - 2¹⁰ = 165429307 is a prime.

It is a super-2 number, since 2×165430331² = 54734388829539122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165430331.

It is not an unprimeable number, because it can be changed into a prime (165430301) 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, 21770 + ... + 28368.

It is an arithmetic number, because the mean of its divisors is an integer number (11761200).

Almost surely, 2^165430331 is an apocalyptic number.

165430331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

165430331 is a deficient number, since it is larger than the sum of its proper divisors (22748869).

165430331 is a wasteful number, since it uses less digits than its factorization.

165430331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6706.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 165430331 is about 12861.9722826633. The cubic root of 165430331 is about 548.9570660174.

Adding to 165430331 its reverse (133034561), we get a palindrome (298464892).

The spelling of 165430331 in words is "one hundred sixty-five million, four hundred thirty thousand, three hundred thirty-one".