231326820065 has 16 divisors (see below), whose sum is σ = 302989308480. Its totient is φ = 168147981120.

The previous prime is 231326820061. The next prime is 231326820073. The reversal of 231326820065 is 560028623132.

It is a happy number.

It is not a de Polignac number, because 231326820065 - 2² = 231326820061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231326820061) 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, 1017155 + ... + 1223624.

It is an arithmetic number, because the mean of its divisors is an integer number (18936831780).

Almost surely, 2^231326820065 is an apocalyptic number.

It is an amenable number.

231326820065 is a deficient number, since it is larger than the sum of its proper divisors (71662488415).

231326820065 is a wasteful number, since it uses less digits than its factorization.

231326820065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242672.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 231326820065 in words is "two hundred thirty-one billion, three hundred twenty-six million, eight hundred twenty thousand, sixty-five".