21552425512 has 32 divisors (see below), whose sum is σ = 42827204520. Its totient is φ = 10133002240.

The previous prime is 21552425449. The next prime is 21552425513.

21552425512 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 20270355876 + 1282069636 = 142374^2 + 35806^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (21552425513) 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, 76962 + ... + 221422.

Almost surely, 2^21552425512 is an apocalyptic number.

It is an amenable number.

21552425512 is a deficient number, since it is larger than the sum of its proper divisors (21274779008).

21552425512 is a wasteful number, since it uses less digits than its factorization.

21552425512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145581 (or 145577 counting only the distinct ones).

The product of its digits is 40000, while the sum is 34.

The spelling of 21552425512 in words is "twenty-one billion, five hundred fifty-two million, four hundred twenty-five thousand, five hundred twelve".