231320282023133 has 4 divisors (see below), whose sum is σ = 231320315077788. Its totient is φ = 231320248968480.

The previous prime is 231320282023093. The next prime is 231320282023139. The reversal of 231320282023133 is 331320282023132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 78359709818404 + 152960572204729 = 8852102^2 + 12367723^2 .

It is a cyclic number.

It is not a de Polignac number, because 231320282023133 - 2⁴⁴ = 213728095978717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231320282023093 and 231320282023102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231320282023139) 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, 1438016 + ... + 21557097.

It is an arithmetic number, because the mean of its divisors is an integer number (57830078769447).

Almost surely, 2^{231320282023133} is an apocalyptic number.

It is an amenable number.

231320282023133 is a deficient number, since it is larger than the sum of its proper divisors (33054655).

231320282023133 is a wasteful number, since it uses less digits than its factorization.

231320282023133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33054654.

The product of its (nonzero) digits is 62208, while the sum is 35.

Subtracting 231320282023133 from its reverse (331320282023132), we obtain a palindrome (99999999999999).

The spelling of 231320282023133 in words is "two hundred thirty-one trillion, three hundred twenty billion, two hundred eighty-two million, twenty-three thousand, one hundred thirty-three".