231302133533 has 2 divisors, whose sum is σ = 231302133534. Its totient is φ = 231302133532.

The previous prime is 231302133511. The next prime is 231302133541. The reversal of 231302133533 is 335331203132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225096160249 + 6205973284 = 474443^2 + 78778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231302133533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231302133496 and 231302133505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231302133563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115651066766 + 115651066767.

It is an arithmetic number, because the mean of its divisors is an integer number (115651066767).

Almost surely, 2^231302133533 is an apocalyptic number.

It is an amenable number.

231302133533 is a deficient number, since it is larger than the sum of its proper divisors (1).

231302133533 is an equidigital number, since it uses as much as digits as its factorization.

231302133533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 29.

Adding to 231302133533 its reverse (335331203132), we get a palindrome (566633336665).

The spelling of 231302133533 in words is "two hundred thirty-one billion, three hundred two million, one hundred thirty-three thousand, five hundred thirty-three".