231323133323231 has 4 divisors (see below), whose sum is σ = 231325046676072. Its totient is φ = 231321219970392.

The previous prime is 231323133323213. The next prime is 231323133323257. The reversal of 231323133323231 is 132323331323132.

It is a happy number.

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 231323133323231 - 2⁶ = 231323133323167 is a prime.

It is a super-2 number, since 2×231323133323231² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231323133323191 and 231323133323200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231323133323201) 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, 956495060 + ... + 956736873.

It is an arithmetic number, because the mean of its divisors is an integer number (57831261669018).

Almost surely, 2^{231323133323231} is an apocalyptic number.

231323133323231 is a deficient number, since it is larger than the sum of its proper divisors (1913352841).

231323133323231 is a wasteful number, since it uses less digits than its factorization.

231323133323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913352840.

The product of its digits is 104976, while the sum is 35.

Adding to 231323133323231 its reverse (132323331323132), we get a palindrome (363646464646363).

The spelling of 231323133323231 in words is "two hundred thirty-one trillion, three hundred twenty-three billion, one hundred thirty-three million, three hundred twenty-three thousand, two hundred thirty-one".