208864031 has 2 divisors, whose sum is σ = 208864032. Its totient is φ = 208864030.

The previous prime is 208864013. The next prime is 208864087. The reversal of 208864031 is 130468802.

208864031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (208864013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 208864031 - 2¹⁰ = 208863007 is a prime.

It is a super-2 number, since 2×208864031² = 87248366891137922, which contains 22 as substring.

It is a Chen prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208867031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104432015 + 104432016.

It is an arithmetic number, because the mean of its divisors is an integer number (104432016).

Almost surely, 2^208864031 is an apocalyptic number.

208864031 is a deficient number, since it is larger than the sum of its proper divisors (1).

208864031 is an equidigital number, since it uses as much as digits as its factorization.

208864031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 208864031 is about 14452.1289435156. The cubic root of 208864031 is about 593.3184932604.

The spelling of 208864031 in words is "two hundred eight million, eight hundred sixty-four thousand, thirty-one".