208239031 has 32 divisors (see below), whose sum is σ = 294336000. Its totient is φ = 141886080.

The previous prime is 208239029. The next prime is 208239043. The reversal of 208239031 is 130932802.

It is not a de Polignac number, because 208239031 - 2¹ = 208239029 is a prime.

It is a super-2 number, since 2×208239031² = 86726988063637922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208239061) 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 31 ways as a sum of consecutive naturals, for example, 13545 + ... + 24493.

It is an arithmetic number, because the mean of its divisors is an integer number (9198000).

Almost surely, 2^208239031 is an apocalyptic number.

208239031 is a deficient number, since it is larger than the sum of its proper divisors (86096969).

208239031 is a wasteful number, since it uses less digits than its factorization.

208239031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10999.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 208239031 is about 14430.4896313327. The cubic root of 208239031 is about 592.7260910255.

The spelling of 208239031 in words is "two hundred eight million, two hundred thirty-nine thousand, thirty-one".