208030311 has 12 divisors (see below), whose sum is σ = 310850280. Its totient is φ = 133904400.

The previous prime is 208030307. The next prime is 208030321. The reversal of 208030311 is 113030802.

208030311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 208030311 - 2² = 208030307 is a prime.

It is a super-2 number, since 2×208030311² = 86553220589513442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208030301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 398265 + ... + 398786.

It is an arithmetic number, because the mean of its divisors is an integer number (25904190).

Almost surely, 2^208030311 is an apocalyptic number.

208030311 is a deficient number, since it is larger than the sum of its proper divisors (102819969).

208030311 is a wasteful number, since it uses less digits than its factorization.

208030311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797086 (or 797083 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 208030311 is about 14423.2559084279. The cubic root of 208030311 is about 592.5279931228.

The spelling of 208030311 in words is "two hundred eight million, thirty thousand, three hundred eleven".