51536503 has 6 divisors (see below), whose sum is σ = 54746696. Its totient is φ = 48504672.

The previous prime is 51536483. The next prime is 51536533. The reversal of 51536503 is 30563515.

It is a happy number.

51536503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-51536503 is a prime.

It is a super-2 number, since 2×51536503² = 5312022282938018, which 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 (51536533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88875 + ... + 89452.

Almost surely, 2^51536503 is an apocalyptic number.

51536503 is a deficient number, since it is larger than the sum of its proper divisors (3210193).

51536503 is a wasteful number, since it uses less digits than its factorization.

51536503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178361 (or 178344 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 28.

The square root of 51536503 is about 7178.8928812178. The cubic root of 51536503 is about 372.1388250312.

The spelling of 51536503 in words is "fifty-one million, five hundred thirty-six thousand, five hundred three".