55220451543 has 16 divisors (see below), whose sum is σ = 81929660640. Its totient is φ = 36758921472.

The previous prime is 55220451499. The next prime is 55220451557. The reversal of 55220451543 is 34515402255.

55220451543 is a `hidden beast` number, since 5 + 52 + 20 + 45 + 1 + 543 = 666.

It is not a de Polignac number, because 55220451543 - 2⁸ = 55220451287 is a prime.

It is a super-2 number, since 2×55220451543² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55220451498 and 55220451507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55220401543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1501296 + ... + 1537637.

It is an arithmetic number, because the mean of its divisors is an integer number (5120603790).

Almost surely, 2^55220451543 is an apocalyptic number.

55220451543 is a deficient number, since it is larger than the sum of its proper divisors (26709209097).

55220451543 is a wasteful number, since it uses less digits than its factorization.

55220451543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039615 (or 3039609 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

Adding to 55220451543 its reverse (34515402255), we get a palindrome (89735853798).

The spelling of 55220451543 in words is "fifty-five billion, two hundred twenty million, four hundred fifty-one thousand, five hundred forty-three".