55054431321 has 36 divisors (see below), whose sum is σ = 78023194704. Its totient is φ = 34527942240.

The previous prime is 55054431253. The next prime is 55054431373. The reversal of 55054431321 is 12313445055.

It is not a de Polignac number, because 55054431321 - 2¹⁰ = 55054430297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55054431391) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5900566 + ... + 5909888.

It is an arithmetic number, because the mean of its divisors is an integer number (2167310964).

Almost surely, 2^55054431321 is an apocalyptic number.

It is an amenable number.

55054431321 is a deficient number, since it is larger than the sum of its proper divisors (22968763383).

55054431321 is an equidigital number, since it uses as much as digits as its factorization.

55054431321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9494 (or 9410 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 55054431321 its reverse (12313445055), we get a palindrome (67367876376).

The spelling of 55054431321 in words is "fifty-five billion, fifty-four million, four hundred thirty-one thousand, three hundred twenty-one".