55004223557 has 8 divisors (see below), whose sum is σ = 55252940184. Its totient is φ = 54755615488.

The previous prime is 55004223551. The next prime is 55004223559. The reversal of 55004223557 is 75532240055.

It can be written as a sum of positive squares in 4 ways, for example, as 2642885281 + 52361338276 = 51409^2 + 228826^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55004223557 - 2⁸ = 55004223301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55004223557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55004223551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1092143 + ... + 1141395.

It is an arithmetic number, because the mean of its divisors is an integer number (6906617523).

Almost surely, 2^55004223557 is an apocalyptic number.

It is an amenable number.

55004223557 is a deficient number, since it is larger than the sum of its proper divisors (248716627).

55004223557 is a wasteful number, since it uses less digits than its factorization.

55004223557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54279.

The product of its (nonzero) digits is 210000, while the sum is 38.

The spelling of 55004223557 in words is "fifty-five billion, four million, two hundred twenty-three thousand, five hundred fifty-seven".