208971402250 has 32 divisors (see below), whose sum is σ = 421286353488. Its totient is φ = 77158670400.

The previous prime is 208971402247. The next prime is 208971402253. The reversal of 208971402250 is 52204179802.

It is an interprime number because it is at equal distance from previous prime (208971402247) and next prime (208971402253).

It can be written as a sum of positive squares in 8 ways, for example, as 1736138889 + 207235263361 = 41667^2 + 455231^2 .

It is not an unprimeable number, because it can be changed into a prime (208971402253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32146197 + ... + 32152696.

Almost surely, 2^208971402250 is an apocalyptic number.

208971402250 is an abundant number, since it is smaller than the sum of its proper divisors (212314951238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

208971402250 is a wasteful number, since it uses less digits than its factorization.

208971402250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64298923 (or 64298913 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 208971402250 in words is "two hundred eight billion, nine hundred seventy-one million, four hundred two thousand, two hundred fifty".