208523131 has 8 divisors (see below), whose sum is σ = 211331120. Its totient is φ = 205728768.

The previous prime is 208523123. The next prime is 208523153. The reversal of 208523131 is 131325802.

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 208523131 - 2³ = 208523123 is a prime.

It is a super-2 number, since 2×208523131² = 86963792324086322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 208523096 and 208523105.

It is not an unprimeable number, because it can be changed into a prime (208523111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29500 + ... + 35878.

It is an arithmetic number, because the mean of its divisors is an integer number (26416390).

Almost surely, 2^208523131 is an apocalyptic number.

208523131 is a deficient number, since it is larger than the sum of its proper divisors (2807989).

208523131 is an equidigital number, since it uses as much as digits as its factorization.

208523131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6813.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 208523131 is about 14440.3300170045. The cubic root of 208523131 is about 592.9955201202.

Adding to 208523131 its reverse (131325802), we get a palindrome (339848933).

The spelling of 208523131 in words is "two hundred eight million, five hundred twenty-three thousand, one hundred thirty-one".