201253665 has 16 divisors (see below), whose sum is σ = 322185600. Its totient is φ = 107275392.

The previous prime is 201253651. The next prime is 201253691. The reversal of 201253665 is 566352102.

It is not a de Polignac number, because 201253665 - 2⁶ = 201253601 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, 42276 + ... + 46794.

It is an arithmetic number, because the mean of its divisors is an integer number (20136600).

Almost surely, 2^201253665 is an apocalyptic number.

It is an amenable number.

201253665 is a deficient number, since it is larger than the sum of its proper divisors (120931935).

201253665 is a wasteful number, since it uses less digits than its factorization.

201253665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7496.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 201253665 is about 14186.3901327998. The cubic root of 201253665 is about 586.0229162801.

The spelling of 201253665 in words is "two hundred one million, two hundred fifty-three thousand, six hundred sixty-five".