55551421204 has 12 divisors (see below), whose sum is σ = 99283391424. Its totient is φ = 27184737944.

The previous prime is 55551421201. The next prime is 55551421223. The reversal of 55551421204 is 40212415555.

It is a self number, because there is not a number n which added to its sum of digits gives 55551421204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55551421201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147742954 + ... + 147743329.

It is an arithmetic number, because the mean of its divisors is an integer number (8273615952).

Almost surely, 2^55551421204 is an apocalyptic number.

It is an amenable number.

55551421204 is a deficient number, since it is larger than the sum of its proper divisors (43731970220).

55551421204 is a wasteful number, since it uses less digits than its factorization.

55551421204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295486334 (or 295486332 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

Adding to 55551421204 its reverse (40212415555), we get a palindrome (95763836759).

The spelling of 55551421204 in words is "fifty-five billion, five hundred fifty-one million, four hundred twenty-one thousand, two hundred four".