165254131 has 4 divisors (see below), whose sum is σ = 188861872. Its totient is φ = 141646392.

The previous prime is 165254107. The next prime is 165254143. The reversal of 165254131 is 131452561.

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

It is a cyclic number.

It is not a de Polignac number, because 165254131 - 2¹⁵ = 165221363 is a prime.

It is a super-2 number, since 2×165254131² = 54617855625130322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165254131.

It is not an unprimeable number, because it can be changed into a prime (165254431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11803860 + ... + 11803873.

It is an arithmetic number, because the mean of its divisors is an integer number (47215468).

Almost surely, 2^165254131 is an apocalyptic number.

165254131 is a deficient number, since it is larger than the sum of its proper divisors (23607741).

165254131 is an equidigital number, since it uses as much as digits as its factorization.

165254131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23607740.

The product of its digits is 3600, while the sum is 28.

The square root of 165254131 is about 12855.1208084561. The cubic root of 165254131 is about 548.7620985531.

The spelling of 165254131 in words is "one hundred sixty-five million, two hundred fifty-four thousand, one hundred thirty-one".