538165 has 8 divisors (see below), whose sum is σ = 663480. Its totient is φ = 418752.

The previous prime is 538163. The next prime is 538199. The reversal of 538165 is 561835.

It can be written as a sum of positive squares in 4 ways, for example, as 253009 + 285156 = 503^2 + 534^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 538165 - 2¹ = 538163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270 + ... + 1639.

It is an arithmetic number, because the mean of its divisors is an integer number (82935).

2⁵³⁸¹⁶⁵ is an apocalyptic number.

It is an amenable number.

538165 is a deficient number, since it is larger than the sum of its proper divisors (125315).

538165 is a wasteful number, since it uses less digits than its factorization.

538165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951.

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

The square root of 538165 is about 733.5973009765. The cubic root of 538165 is about 81.3401838865.

It can be divided in two parts, 538 and 165, that added together give a triangular number (703 = T₃₇).

The spelling of 538165 in words is "five hundred thirty-eight thousand, one hundred sixty-five".