208431 has 6 divisors (see below), whose sum is σ = 301080. Its totient is φ = 138948.

The previous prime is 208409. The next prime is 208433. The reversal of 208431 is 134802.

It is a happy number.

It is not a de Polignac number, because 208431 - 2⁶ = 208367 is a prime.

It is a super-2 number, since 2×208431² = 86886963522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11571 + ... + 11588.

It is an arithmetic number, because the mean of its divisors is an integer number (50180).

2²⁰⁸⁴³¹ is an apocalyptic number.

208431 is a deficient number, since it is larger than the sum of its proper divisors (92649).

208431 is a wasteful number, since it uses less digits than its factorization.

208431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23165 (or 23162 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 208431 is about 456.5424405244. The cubic root of 208431 is about 59.2908173586.

The spelling of 208431 in words is "two hundred eight thousand, four hundred thirty-one".