201268865 has 16 divisors (see below), whose sum is σ = 292263552. Its totient is φ = 129894144.

The previous prime is 201268849. The next prime is 201268897. The reversal of 201268865 is 568862102.

It is not a de Polignac number, because 201268865 - 2⁴ = 201268849 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168539 + ... + 169728.

It is an arithmetic number, because the mean of its divisors is an integer number (18266472).

Almost surely, 2^201268865 is an apocalyptic number.

It is an amenable number.

201268865 is a deficient number, since it is larger than the sum of its proper divisors (90994687).

201268865 is a wasteful number, since it uses less digits than its factorization.

201268865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338296.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 201268865 is about 14186.9258474132. The cubic root of 201268865 is about 586.0376693432.

The spelling of 201268865 in words is "two hundred one million, two hundred sixty-eight thousand, eight hundred sixty-five".