165316541 has 4 divisors (see below), whose sum is σ = 178033212. Its totient is φ = 152599872.

The previous prime is 165316519. The next prime is 165316577. The reversal of 165316541 is 145613561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 145613561 = 947 ⋅153763.

It can be written as a sum of positive squares in 2 ways, for example, as 104632441 + 60684100 = 10229^2 + 7790^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165316541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165316498 and 165316507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165316241) 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, 6358316 + ... + 6358341.

It is an arithmetic number, because the mean of its divisors is an integer number (44508303).

Almost surely, 2^165316541 is an apocalyptic number.

It is an amenable number.

165316541 is a deficient number, since it is larger than the sum of its proper divisors (12716671).

165316541 is a wasteful number, since it uses less digits than its factorization.

165316541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12716670.

The product of its digits is 10800, while the sum is 32.

The square root of 165316541 is about 12857.5480166321. The cubic root of 165316541 is about 548.8311718281.

The spelling of 165316541 in words is "one hundred sixty-five million, three hundred sixteen thousand, five hundred forty-one".