23326401521 has 2 divisors, whose sum is σ = 23326401522. Its totient is φ = 23326401520.

The previous prime is 23326401509. The next prime is 23326401541. The reversal of 23326401521 is 12510462332.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12385241521 + 10941160000 = 111289^2 + 104600^2 .

It is a cyclic number.

It is not a de Polignac number, because 23326401521 - 2⁶ = 23326401457 is a prime.

It is a super-2 number, since 2×23326401521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23326401541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11663200760 + 11663200761.

It is an arithmetic number, because the mean of its divisors is an integer number (11663200761).

Almost surely, 2^23326401521 is an apocalyptic number.

It is an amenable number.

23326401521 is a deficient number, since it is larger than the sum of its proper divisors (1).

23326401521 is an equidigital number, since it uses as much as digits as its factorization.

23326401521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 23326401521 its reverse (12510462332), we get a palindrome (35836863853).

The spelling of 23326401521 in words is "twenty-three billion, three hundred twenty-six million, four hundred one thousand, five hundred twenty-one".