165032031 has 4 divisors (see below), whose sum is σ = 220042712. Its totient is φ = 110021352.

The previous prime is 165031973. The next prime is 165032033. The reversal of 165032031 is 130230561.

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

It is not a de Polignac number, because 165032031 - 2¹¹ = 165029983 is a prime.

It is a super-2 number, since 2×165032031² = 54471142511969922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165031989 and 165032007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165032033) 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, 27505336 + ... + 27505341.

It is an arithmetic number, because the mean of its divisors is an integer number (55010678).

Almost surely, 2^165032031 is an apocalyptic number.

165032031 is a deficient number, since it is larger than the sum of its proper divisors (55010681).

165032031 is an equidigital number, since it uses as much as digits as its factorization.

165032031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55010680.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 165032031 is about 12846.4793231453. The cubic root of 165032031 is about 548.5161446315.

Adding to 165032031 its reverse (130230561), we get a palindrome (295262592).

The spelling of 165032031 in words is "one hundred sixty-five million, thirty-two thousand, thirty-one".