51326503 has 2 divisors, whose sum is σ = 51326504. Its totient is φ = 51326502.

The previous prime is 51326449. The next prime is 51326533. The reversal of 51326503 is 30562315.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51326503 - 2²⁵ = 17772071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51326533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25663251 + 25663252.

It is an arithmetic number, because the mean of its divisors is an integer number (25663252).

Almost surely, 2^51326503 is an apocalyptic number.

51326503 is a deficient number, since it is larger than the sum of its proper divisors (1).

51326503 is an equidigital number, since it uses as much as digits as its factorization.

51326503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 51326503 is about 7164.2517404123. The cubic root of 51326503 is about 371.6326754313.

Adding to 51326503 its reverse (30562315), we get a palindrome (81888818).

The spelling of 51326503 in words is "fifty-one million, three hundred twenty-six thousand, five hundred three".