51023144503 has 4 divisors (see below), whose sum is σ = 51549156400. Its totient is φ = 50497132608.

The previous prime is 51023144477. The next prime is 51023144527. The reversal of 51023144503 is 30544132015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30544132015 = 5 ⋅6108826403.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51023144503 is a prime.

It is a super-2 number, since 2×51023144503² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51023144303) 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, 263005803 + ... + 263005996.

It is an arithmetic number, because the mean of its divisors is an integer number (12887289100).

Almost surely, 2^51023144503 is an apocalyptic number.

51023144503 is a deficient number, since it is larger than the sum of its proper divisors (526011897).

51023144503 is an equidigital number, since it uses as much as digits as its factorization.

51023144503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526011896.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 51023144503 its reverse (30544132015), we get a palindrome (81567276518).

The spelling of 51023144503 in words is "fifty-one billion, twenty-three million, one hundred forty-four thousand, five hundred three".