231302203133 has 4 divisors (see below), whose sum is σ = 244908215100. Its totient is φ = 217696191168.

The previous prime is 231302203091. The next prime is 231302203147. The reversal of 231302203133 is 331302203132.

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 217083310084 + 14218893049 = 465922^2 + 119243^2 .

It is not a de Polignac number, because 231302203133 - 2¹⁴ = 231302186749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231302203099 and 231302203108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231302202133) 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, 6803005958 + ... + 6803005991.

It is an arithmetic number, because the mean of its divisors is an integer number (61227053775).

Almost surely, 2^231302203133 is an apocalyptic number.

It is an amenable number.

231302203133 is a deficient number, since it is larger than the sum of its proper divisors (13606011967).

231302203133 is a wasteful number, since it uses less digits than its factorization.

231302203133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13606011966.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 231302203133 its reverse (331302203132), we get a palindrome (562604406265).

Subtracting 231302203133 from its reverse (331302203132), we obtain a palindrome (99999999999).

The spelling of 231302203133 in words is "two hundred thirty-one billion, three hundred two million, two hundred three thousand, one hundred thirty-three".