231331213033 has 2 divisors, whose sum is σ = 231331213034. Its totient is φ = 231331213032.

The previous prime is 231331213027. The next prime is 231331213051. The reversal of 231331213033 is 330312133132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230350082704 + 981130329 = 479948^2 + 31323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231331213033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231331212989 and 231331213007.

It is not a weakly prime, because it can be changed into another prime (231331213013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115665606516 + 115665606517.

It is an arithmetic number, because the mean of its divisors is an integer number (115665606517).

Almost surely, 2^231331213033 is an apocalyptic number.

It is an amenable number.

231331213033 is a deficient number, since it is larger than the sum of its proper divisors (1).

231331213033 is an equidigital number, since it uses as much as digits as its factorization.

231331213033 is an evil number, because the sum of its binary digits is even.

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

Adding to 231331213033 its reverse (330312133132), we get a palindrome (561643346165).

The spelling of 231331213033 in words is "two hundred thirty-one billion, three hundred thirty-one million, two hundred thirteen thousand, thirty-three".