55000015503 has 4 divisors (see below), whose sum is σ = 73333354008. Its totient is φ = 36666677000.

The previous prime is 55000015501. The next prime is 55000015523. The reversal of 55000015503 is 30551000055.

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 55000015503 - 2¹ = 55000015501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55000015501) 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, 9166669248 + ... + 9166669253.

It is an arithmetic number, because the mean of its divisors is an integer number (18333338502).

Almost surely, 2^55000015503 is an apocalyptic number.

55000015503 is a deficient number, since it is larger than the sum of its proper divisors (18333338505).

55000015503 is a wasteful number, since it uses less digits than its factorization.

55000015503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18333338504.

The product of its (nonzero) digits is 1875, while the sum is 24.

Adding to 55000015503 its reverse (30551000055), we get a palindrome (85551015558).

The spelling of 55000015503 in words is "fifty-five billion, fifteen thousand, five hundred three".