231065204311 has 4 divisors (see below), whose sum is σ = 231068214000. Its totient is φ = 231062194624.

The previous prime is 231065204281. The next prime is 231065204341. The reversal of 231065204311 is 113402560132.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (231065204281) and next prime (231065204341).

It is a cyclic number.

It is not a de Polignac number, because 231065204311 - 2²⁵ = 231031649879 is a prime.

It is a super-2 number, since 2×231065204311² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231065204311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231065204341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1386586 + ... + 1544263.

It is an arithmetic number, because the mean of its divisors is an integer number (57767053500).

Almost surely, 2^231065204311 is an apocalyptic number.

231065204311 is a deficient number, since it is larger than the sum of its proper divisors (3009689).

231065204311 is an equidigital number, since it uses as much as digits as its factorization.

231065204311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3009688.

The product of its (nonzero) digits is 4320, while the sum is 28.

Adding to 231065204311 its reverse (113402560132), we get a palindrome (344467764443).

The spelling of 231065204311 in words is "two hundred thirty-one billion, sixty-five million, two hundred four thousand, three hundred eleven".