55004421251 has 4 divisors (see below), whose sum is σ = 59235530592. Its totient is φ = 50773311912.

The previous prime is 55004421211. The next prime is 55004421259. The reversal of 55004421251 is 15212440055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55004421251 - 2⁶ = 55004421187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55004421259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2115554651 + ... + 2115554676.

It is an arithmetic number, because the mean of its divisors is an integer number (14808882648).

Almost surely, 2^55004421251 is an apocalyptic number.

55004421251 is a deficient number, since it is larger than the sum of its proper divisors (4231109341).

55004421251 is a wasteful number, since it uses less digits than its factorization.

55004421251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4231109340.

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 55004421251 in words is "fifty-five billion, four million, four hundred twenty-one thousand, two hundred fifty-one".