51415523 has 2 divisors, whose sum is σ = 51415524. Its totient is φ = 51415522.

The previous prime is 51415513. The next prime is 51415543. The reversal of 51415523 is 32551415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51415523 - 2¹² = 51411427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51415492 and 51415501.

It is not a weakly prime, because it can be changed into another prime (51415513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25707761 + 25707762.

It is an arithmetic number, because the mean of its divisors is an integer number (25707762).

Almost surely, 2^51415523 is an apocalyptic number.

51415523 is a deficient number, since it is larger than the sum of its proper divisors (1).

51415523 is an equidigital number, since it uses as much as digits as its factorization.

51415523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000, while the sum is 26.

The square root of 51415523 is about 7170.4618400770. The cubic root of 51415523 is about 371.8474029187.

Adding to 51415523 its reverse (32551415), we get a palindrome (83966938).

The spelling of 51415523 in words is "fifty-one million, four hundred fifteen thousand, five hundred twenty-three".