208097281 has 4 divisors (see below), whose sum is σ = 237825472. Its totient is φ = 178369092.

The previous prime is 208097257. The next prime is 208097293. The reversal of 208097281 is 182790802.

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.

It is a cyclic number.

It is not a de Polignac number, because 208097281 - 2⁵ = 208097249 is a prime.

It is a super-2 number, since 2×208097281² = 86608956719185922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 208097281.

It is not an unprimeable number, because it can be changed into a prime (208097251) 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, 14864085 + ... + 14864098.

It is an arithmetic number, because the mean of its divisors is an integer number (59456368).

Almost surely, 2^208097281 is an apocalyptic number.

It is an amenable number.

208097281 is a deficient number, since it is larger than the sum of its proper divisors (29728191).

208097281 is an equidigital number, since it uses as much as digits as its factorization.

208097281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29728190.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 208097281 is about 14425.5773194697. The cubic root of 208097281 is about 592.5915693425.

The spelling of 208097281 in words is "two hundred eight million, ninety-seven thousand, two hundred eighty-one".