51340503 has 4 divisors (see below), whose sum is σ = 68454008. Its totient is φ = 34227000.

The previous prime is 51340501. The next prime is 51340511. The reversal of 51340503 is 30504315.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51340503 - 2¹ = 51340501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51340503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51340501) 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, 8556748 + ... + 8556753.

It is an arithmetic number, because the mean of its divisors is an integer number (17113502).

Almost surely, 2^51340503 is an apocalyptic number.

51340503 is a deficient number, since it is larger than the sum of its proper divisors (17113505).

51340503 is a wasteful number, since it uses less digits than its factorization.

51340503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17113504.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 51340503 is about 7165.2287472208. The cubic root of 51340503 is about 371.6664616442. Note that the first 3 decimals are identical.

Adding to 51340503 its reverse (30504315), we get a palindrome (81844818).

The spelling of 51340503 in words is "fifty-one million, three hundred forty thousand, five hundred three".