208090251 has 12 divisors (see below), whose sum is σ = 318255912. Its totient is φ = 130566336.

The previous prime is 208090241. The next prime is 208090273. The reversal of 208090251 is 152090802.

208090251 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 208090251 - 2¹¹ = 208088203 is a prime.

It is a super-2 number, since 2×208090251² = 86603105122486002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (208090241) 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, 679881 + ... + 680186.

It is an arithmetic number, because the mean of its divisors is an integer number (26521326).

Almost surely, 2^208090251 is an apocalyptic number.

208090251 is a deficient number, since it is larger than the sum of its proper divisors (110165661).

208090251 is a wasteful number, since it uses less digits than its factorization.

208090251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360090 (or 1360087 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 208090251 is about 14425.3336529870. Note that the first 3 decimals coincide. The cubic root of 208090251 is about 592.5848962365.

The spelling of 208090251 in words is "two hundred eight million, ninety thousand, two hundred fifty-one".