55220323354521 has 8 divisors (see below), whose sum is σ = 79290720714240. Its totient is φ = 33981737448912.

The previous prime is 55220323354487. The next prime is 55220323354523. The reversal of 55220323354521 is 12545332302255.

55220323354521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55220323354521 - 2¹¹ = 55220323352473 is a prime.

It is a super-2 number, since 2×55220323354521² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55220323354523) 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 7 ways as a sum of consecutive naturals, for example, 707952863481 + ... + 707952863558.

It is an arithmetic number, because the mean of its divisors is an integer number (9911340089280).

Almost surely, 2^{55220323354521} is an apocalyptic number.

It is an amenable number.

55220323354521 is a deficient number, since it is larger than the sum of its proper divisors (24070397359719).

55220323354521 is a wasteful number, since it uses less digits than its factorization.

55220323354521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415905727055.

The product of its (nonzero) digits is 1080000, while the sum is 42.

Adding to 55220323354521 its reverse (12545332302255), we get a palindrome (67765655656776).

The spelling of 55220323354521 in words is "fifty-five trillion, two hundred twenty billion, three hundred twenty-three million, three hundred fifty-four thousand, five hundred twenty-one".