231312033133 has 4 divisors (see below), whose sum is σ = 231322865020. Its totient is φ = 231301201248.

The previous prime is 231312033109. The next prime is 231312033181. The reversal of 231312033133 is 331330213132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 228195379204 + 3116653929 = 477698^2 + 55827^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231312033133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231312033098 and 231312033107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231312037133) 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, 5383848 + ... + 5426641.

It is an arithmetic number, because the mean of its divisors is an integer number (57830716255).

Almost surely, 2^231312033133 is an apocalyptic number.

It is an amenable number.

231312033133 is a deficient number, since it is larger than the sum of its proper divisors (10831887).

231312033133 is a wasteful number, since it uses less digits than its factorization.

231312033133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10831886.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 231312033133 its reverse (331330213132), we get a palindrome (562642246265).

The spelling of 231312033133 in words is "two hundred thirty-one billion, three hundred twelve million, thirty-three thousand, one hundred thirty-three".