231330013231 has 4 divisors (see below), whose sum is σ = 232230130272. Its totient is φ = 230429896192.

The previous prime is 231330013223. The next prime is 231330013259. The reversal of 231330013231 is 132310033132.

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

It is a cyclic number.

It is not a de Polignac number, because 231330013231 - 2³ = 231330013223 is a prime.

It is a super-2 number, since 2×231330013231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231330016231) 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, 450058135 + ... + 450058648.

It is an arithmetic number, because the mean of its divisors is an integer number (58057532568).

Almost surely, 2^231330013231 is an apocalyptic number.

231330013231 is a deficient number, since it is larger than the sum of its proper divisors (900117041).

231330013231 is an equidigital number, since it uses as much as digits as its factorization.

231330013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900117040.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 231330013231 its reverse (132310033132), we get a palindrome (363640046363).

The spelling of 231330013231 in words is "two hundred thirty-one billion, three hundred thirty million, thirteen thousand, two hundred thirty-one".