23311023521 has 2 divisors, whose sum is σ = 23311023522. Its totient is φ = 23311023520.

The previous prime is 23311023479. The next prime is 23311023539. The reversal of 23311023521 is 12532011332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16676106496 + 6634917025 = 129136^2 + 81455^2 .

It is a cyclic number.

It is not a de Polignac number, because 23311023521 - 2¹⁸ = 23310761377 is a prime.

It is not a weakly prime, because it can be changed into another prime (23311023581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11655511760 + 11655511761.

It is an arithmetic number, because the mean of its divisors is an integer number (11655511761).

Almost surely, 2^23311023521 is an apocalyptic number.

It is an amenable number.

23311023521 is a deficient number, since it is larger than the sum of its proper divisors (1).

23311023521 is an equidigital number, since it uses as much as digits as its factorization.

23311023521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 23311023521 its reverse (12532011332), we get a palindrome (35843034853).

The spelling of 23311023521 in words is "twenty-three billion, three hundred eleven million, twenty-three thousand, five hundred twenty-one".