55031031503 has 4 divisors (see below), whose sum is σ = 62892607440. Its totient is φ = 47169455568.

The previous prime is 55031031499. The next prime is 55031031547. The reversal of 55031031503 is 30513013055.

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 55031031503 - 2² = 55031031499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55031031593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3930787958 + ... + 3930787971.

It is an arithmetic number, because the mean of its divisors is an integer number (15723151860).

Almost surely, 2^55031031503 is an apocalyptic number.

55031031503 is a deficient number, since it is larger than the sum of its proper divisors (7861575937).

55031031503 is an equidigital number, since it uses as much as digits as its factorization.

55031031503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7861575936.

The product of its (nonzero) digits is 3375, while the sum is 26.

Adding to 55031031503 its reverse (30513013055), we get a palindrome (85544044558).

The spelling of 55031031503 in words is "fifty-five billion, thirty-one million, thirty-one thousand, five hundred three".