55125200421 has 24 divisors (see below), whose sum is σ = 80328252576. Its totient is φ = 36426978720.

The previous prime is 55125200381. The next prime is 55125200437. The reversal of 55125200421 is 12400252155.

It is not a de Polignac number, because 55125200421 - 2¹⁰ = 55125199397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55125200461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 461886 + ... + 568848.

It is an arithmetic number, because the mean of its divisors is an integer number (3347010524).

Almost surely, 2^55125200421 is an apocalyptic number.

It is an amenable number.

55125200421 is a deficient number, since it is larger than the sum of its proper divisors (25203052155).

55125200421 is a wasteful number, since it uses less digits than its factorization.

55125200421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107473 (or 107470 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 55125200421 its reverse (12400252155), we get a palindrome (67525452576).

The spelling of 55125200421 in words is "fifty-five billion, one hundred twenty-five million, two hundred thousand, four hundred twenty-one".