231656065 has 8 divisors (see below), whose sum is σ = 280538280. Its totient is φ = 183624192.

The previous prime is 231656039. The next prime is 231656209. The reversal of 231656065 is 560656132.

231656065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 65658609 + 165997456 = 8103^2 + 12884^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231656065 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231656065.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211984 + ... + 213073.

It is an arithmetic number, because the mean of its divisors is an integer number (35067285).

Almost surely, 2^231656065 is an apocalyptic number.

It is an amenable number.

231656065 is a deficient number, since it is larger than the sum of its proper divisors (48882215).

231656065 is a wasteful number, since it uses less digits than its factorization.

231656065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425171.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 231656065 is about 15220.2518047501. The cubic root of 231656065 is about 614.1595720668.

The spelling of 231656065 in words is "two hundred thirty-one million, six hundred fifty-six thousand, sixty-five".