231033000521 has 16 divisors (see below), whose sum is σ = 234479380608. Its totient is φ = 227613984000.

The previous prime is 231033000493. The next prime is 231033000557. The reversal of 231033000521 is 125000330132.

231033000521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231033000521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231033000493 and 231033000502.

It is not an unprimeable number, because it can be changed into a prime (231033000221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53268065 + ... + 53272401.

It is an arithmetic number, because the mean of its divisors is an integer number (14654961288).

Almost surely, 2^231033000521 is an apocalyptic number.

It is an amenable number.

231033000521 is a deficient number, since it is larger than the sum of its proper divisors (3446380087).

231033000521 is a wasteful number, since it uses less digits than its factorization.

231033000521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7312.

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 231033000521 its reverse (125000330132), we get a palindrome (356033330653).

The spelling of 231033000521 in words is "two hundred thirty-one billion, thirty-three million, five hundred twenty-one", and thus it is an aban number.