208315013 has 2 divisors, whose sum is σ = 208315014. Its totient is φ = 208315012.

The previous prime is 208315007. The next prime is 208315043. The reversal of 208315013 is 310513802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207849889 + 465124 = 14417^2 + 682^2 .

It is a cyclic number.

It is not a de Polignac number, because 208315013 - 2¹⁶ = 208249477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 208315013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (208315043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104157506 + 104157507.

It is an arithmetic number, because the mean of its divisors is an integer number (104157507).

Almost surely, 2^208315013 is an apocalyptic number.

It is an amenable number.

208315013 is a deficient number, since it is larger than the sum of its proper divisors (1).

208315013 is an equidigital number, since it uses as much as digits as its factorization.

208315013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 208315013 is about 14433.1220808251. The cubic root of 208315013 is about 592.7981733134.

Adding to 208315013 its reverse (310513802), we get a palindrome (518828815).

The spelling of 208315013 in words is "two hundred eight million, three hundred fifteen thousand, thirteen".