55203420126503 has 16 divisors (see below), whose sum is σ = 61461646541856. Its totient is φ = 49155009546240.

The previous prime is 55203420126479. The next prime is 55203420126509. The reversal of 55203420126503 is 30562102430255.

It is a cyclic number.

It is not a de Polignac number, because 55203420126503 - 2³⁴ = 55186240257319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55203420126509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79492850 + ... + 80184287.

It is an arithmetic number, because the mean of its divisors is an integer number (3841352908866).

Almost surely, 2^{55203420126503} is an apocalyptic number.

55203420126503 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

55203420126503 is a deficient number, since it is larger than the sum of its proper divisors (6258226415353).

55203420126503 is a wasteful number, since it uses less digits than its factorization.

55203420126503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159677794.

The product of its (nonzero) digits is 216000, while the sum is 38.

Adding to 55203420126503 its reverse (30562102430255), we get a palindrome (85765522556758).

The spelling of 55203420126503 in words is "fifty-five trillion, two hundred three billion, four hundred twenty million, one hundred twenty-six thousand, five hundred three".