201690256 has 20 divisors (see below), whose sum is σ = 401337532. Its totient is φ = 98119296.

The previous prime is 201690199. The next prime is 201690271. The reversal of 201690256 is 652096102.

It can be written as a sum of positive squares in 2 ways, for example, as 99680256 + 102010000 = 9984^2 + 10100^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169755 + ... + 170938.

Almost surely, 2^201690256 is an apocalyptic number.

It is an amenable number.

201690256 is a deficient number, since it is larger than the sum of its proper divisors (199647276).

201690256 is a wasteful number, since it uses less digits than its factorization.

201690256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340738 (or 340732 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 201690256 is about 14201.7694672178. The cubic root of 201690256 is about 586.4463744766.

The spelling of 201690256 in words is "two hundred one million, six hundred ninety thousand, two hundred fifty-six".