208251313 has 4 divisors (see below), whose sum is σ = 212682240. Its totient is φ = 203820388.

The previous prime is 208251299. The next prime is 208251317. The reversal of 208251313 is 313152802.

208251313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 313152802 = 2 ⋅156576401.

It is not a de Polignac number, because 208251313 - 2¹³ = 208243121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208251317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2215393 + ... + 2215486.

It is an arithmetic number, because the mean of its divisors is an integer number (53170560).

Almost surely, 2^208251313 is an apocalyptic number.

It is an amenable number.

208251313 is a deficient number, since it is larger than the sum of its proper divisors (4430927).

208251313 is an equidigital number, since it uses as much as digits as its factorization.

208251313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4430926.

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

The square root of 208251313 is about 14430.9151823438. The cubic root of 208251313 is about 592.7377438501.

The spelling of 208251313 in words is "two hundred eight million, two hundred fifty-one thousand, three hundred thirteen".