23231033521 has 2 divisors, whose sum is σ = 23231033522. Its totient is φ = 23231033520.

The previous prime is 23231033473. The next prime is 23231033557. The reversal of 23231033521 is 12533013232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15602757921 + 7628275600 = 124911^2 + 87340^2 .

It is a cyclic number.

It is not a de Polignac number, because 23231033521 - 2¹⁹ = 23230509233 is a prime.

It is not a weakly prime, because it can be changed into another prime (23231033591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11615516760 + 11615516761.

It is an arithmetic number, because the mean of its divisors is an integer number (11615516761).

Almost surely, 2^23231033521 is an apocalyptic number.

It is an amenable number.

23231033521 is a deficient number, since it is larger than the sum of its proper divisors (1).

23231033521 is an equidigital number, since it uses as much as digits as its factorization.

23231033521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 23231033521 its reverse (12533013232), we get a palindrome (35764046753).

The spelling of 23231033521 in words is "twenty-three billion, two hundred thirty-one million, thirty-three thousand, five hundred twenty-one".