21552412443303 has 16 divisors (see below), whose sum is σ = 32850130279680. Its totient is φ = 12312529651776.

The previous prime is 21552412443277. The next prime is 21552412443383. The reversal of 21552412443303 is 30334421425512.

It is a happy number.

It is not a de Polignac number, because 21552412443303 - 2⁶ = 21552412443239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21552412443383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130523925 + ... + 130688942.

It is an arithmetic number, because the mean of its divisors is an integer number (2053133142480).

Almost surely, 2^{21552412443303} is an apocalyptic number.

21552412443303 is a deficient number, since it is larger than the sum of its proper divisors (11297717836377).

21552412443303 is a wasteful number, since it uses less digits than its factorization.

21552412443303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261216806.

The product of its (nonzero) digits is 345600, while the sum is 39.

Adding to 21552412443303 its reverse (30334421425512), we get a palindrome (51886833868815).

The spelling of 21552412443303 in words is "twenty-one trillion, five hundred fifty-two billion, four hundred twelve million, four hundred forty-three thousand, three hundred three".