165294131 has 4 divisors (see below), whose sum is σ = 165634032. Its totient is φ = 164954232.

The previous prime is 165294127. The next prime is 165294163. The reversal of 165294131 is 131492561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131492561 = 37 ⋅3553853.

It is a cyclic number.

It is not a de Polignac number, because 165294131 - 2² = 165294127 is a prime.

It is a super-2 number, since 2×165294131² = 54644299486090322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165294331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169220 + ... + 170193.

It is an arithmetic number, because the mean of its divisors is an integer number (41408508).

Almost surely, 2^165294131 is an apocalyptic number.

165294131 is a deficient number, since it is larger than the sum of its proper divisors (339901).

165294131 is an equidigital number, since it uses as much as digits as its factorization.

165294131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339900.

The product of its digits is 6480, while the sum is 32.

The square root of 165294131 is about 12856.6765145585. The cubic root of 165294131 is about 548.8063711996.

The spelling of 165294131 in words is "one hundred sixty-five million, two hundred ninety-four thousand, one hundred thirty-one".