23121315552 has 48 divisors (see below), whose sum is σ = 61156795392. Its totient is φ = 7648268160.

The previous prime is 23121315551. The next prime is 23121315601. The reversal of 23121315552 is 25551312132.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121315551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 906688 + ... + 931839.

It is an arithmetic number, because the mean of its divisors is an integer number (1274099904).

Almost surely, 2^23121315552 is an apocalyptic number.

It is an amenable number.

23121315552 is an abundant number, since it is smaller than the sum of its proper divisors (38035479840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23121315552 is a wasteful number, since it uses less digits than its factorization.

23121315552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838671 (or 1838663 counting only the distinct ones).

The product of its digits is 9000, while the sum is 30.

Adding to 23121315552 its reverse (25551312132), we get a palindrome (48672627684).

The spelling of 23121315552 in words is "twenty-three billion, one hundred twenty-one million, three hundred fifteen thousand, five hundred fifty-two".