55543145312220 has 96 divisors (see below), whose sum is σ = 158300151690240. Its totient is φ = 14547261146880.

The previous prime is 55543145312189. The next prime is 55543145312233. The reversal of 55543145312220 is 2221354134555.

It is a super-2 number, since 2×55543145312220² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3207871 + ... + 11017110.

It is an arithmetic number, because the mean of its divisors is an integer number (1648959913440).

Almost surely, 2^{55543145312220} is an apocalyptic number.

It is an amenable number.

55543145312220 is an abundant number, since it is smaller than the sum of its proper divisors (102757006378020).

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

55543145312220 is a wasteful number, since it uses less digits than its factorization.

55543145312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14226155 (or 14226153 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 42.

Adding to 55543145312220 its reverse (2221354134555), we get a palindrome (57764499446775).

The spelling of 55543145312220 in words is "fifty-five trillion, five hundred forty-three billion, one hundred forty-five million, three hundred twelve thousand, two hundred twenty".