21552303439 has 8 divisors (see below), whose sum is σ = 21582634752. Its totient is φ = 21521993880.

The previous prime is 21552303413. The next prime is 21552303449. The reversal of 21552303439 is 93430325512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21552303439 - 2⁵ = 21552303407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21552303398 and 21552303407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21552303449) 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, 3088224 + ... + 3095194.

It is an arithmetic number, because the mean of its divisors is an integer number (2697829344).

Almost surely, 2^21552303439 is an apocalyptic number.

21552303439 is a deficient number, since it is larger than the sum of its proper divisors (30331313).

21552303439 is a wasteful number, since it uses less digits than its factorization.

21552303439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10877.

The product of its (nonzero) digits is 97200, while the sum is 37.

The spelling of 21552303439 in words is "twenty-one billion, five hundred fifty-two million, three hundred three thousand, four hundred thirty-nine".