51140503 has 4 divisors (see below), whose sum is σ = 51354720. Its totient is φ = 50926288.

The previous prime is 51140491. The next prime is 51140563. The reversal of 51140503 is 30504115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30504115 = 5 ⋅6100823.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51140503 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 (51140563) 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, 106750 + ... + 107227.

It is an arithmetic number, because the mean of its divisors is an integer number (12838680).

Almost surely, 2^51140503 is an apocalyptic number.

51140503 is a deficient number, since it is larger than the sum of its proper divisors (214217).

51140503 is a wasteful number, since it uses less digits than its factorization.

51140503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214216.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 51140503 is about 7151.2588402323. The cubic root of 51140503 is about 371.1832172875.

Adding to 51140503 its reverse (30504115), we get a palindrome (81644618).

It can be divided in two parts, 511 and 40503, that added together give a palindrome (41014).

The spelling of 51140503 in words is "fifty-one million, one hundred forty thousand, five hundred three".