54551111321 has 16 divisors (see below), whose sum is σ = 63739491840. Its totient is φ = 45713725440.

The previous prime is 54551111311. The next prime is 54551111323. The reversal of 54551111321 is 12311115545.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 54551111321 - 2¹⁴ = 54551094937 is a prime.

It is a super-2 number, since 2×54551111321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54551111323) 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, 216401 + ... + 394881.

It is an arithmetic number, because the mean of its divisors is an integer number (3983718240).

Almost surely, 2^54551111321 is an apocalyptic number.

It is an amenable number.

54551111321 is a deficient number, since it is larger than the sum of its proper divisors (9188380519).

54551111321 is a wasteful number, since it uses less digits than its factorization.

54551111321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179464.

The product of its digits is 3000, while the sum is 29.

Adding to 54551111321 its reverse (12311115545), we get a palindrome (66862226866).

The spelling of 54551111321 in words is "fifty-four billion, five hundred fifty-one million, one hundred eleven thousand, three hundred twenty-one".