55555115321 has 12 divisors (see below), whose sum is σ = 56693267316. Its totient is φ = 54429580800.

The previous prime is 55555115267. The next prime is 55555115339. The reversal of 55555115321 is 12351155555.

It can be written as a sum of positive squares in 2 ways, for example, as 36256348921 + 19298766400 = 190411^2 + 138920^2 .

It is not a de Polignac number, because 55555115321 - 2¹⁰ = 55555114297 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555165321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1647785 + ... + 1681161.

It is an arithmetic number, because the mean of its divisors is an integer number (4724438943).

Almost surely, 2^55555115321 is an apocalyptic number.

It is an amenable number.

55555115321 is a deficient number, since it is larger than the sum of its proper divisors (1138151995).

55555115321 is an equidigital number, since it uses as much as digits as its factorization.

55555115321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33752 (or 33601 counting only the distinct ones).

The product of its digits is 93750, while the sum is 38.

The spelling of 55555115321 in words is "fifty-five billion, five hundred fifty-five million, one hundred fifteen thousand, three hundred twenty-one".