204106537 has 4 divisors (see below), whose sum is σ = 204244740. Its totient is φ = 203968336.

The previous prime is 204106519. The next prime is 204106603. The reversal of 204106537 is 735601402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 735601402 = 2 ⋅367800701.

It can be written as a sum of positive squares in 2 ways, for example, as 159870736 + 44235801 = 12644^2 + 6651^2 .

It is a cyclic number.

It is not a de Polignac number, because 204106537 - 2¹¹ = 204104489 is a prime.

It is a super-2 number, since 2×204106537² = 83318956892264738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204106517) 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, 66862 + ... + 69847.

It is an arithmetic number, because the mean of its divisors is an integer number (51061185).

Almost surely, 2^204106537 is an apocalyptic number.

It is an amenable number.

204106537 is a deficient number, since it is larger than the sum of its proper divisors (138203).

204106537 is a wasteful number, since it uses less digits than its factorization.

204106537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138202.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 204106537 is about 14286.5859112666. The cubic root of 204106537 is about 588.7789907034.

Adding to 204106537 its reverse (735601402), we get a palindrome (939707939).

The spelling of 204106537 in words is "two hundred four million, one hundred six thousand, five hundred thirty-seven".