51345563 has 2 divisors, whose sum is σ = 51345564. Its totient is φ = 51345562.

The previous prime is 51345533. The next prime is 51345583. The reversal of 51345563 is 36554315.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51345563 is a prime.

It is not a weakly prime, because it can be changed into another prime (51345533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25672781 + 25672782.

It is an arithmetic number, because the mean of its divisors is an integer number (25672782).

Almost surely, 2^51345563 is an apocalyptic number.

51345563 is a deficient number, since it is larger than the sum of its proper divisors (1).

51345563 is an equidigital number, since it uses as much as digits as its factorization.

51345563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 32.

The square root of 51345563 is about 7165.5818326218. The cubic root of 51345563 is about 371.6786714357.

Adding to 51345563 its reverse (36554315), we get a palindrome (87899878).

The spelling of 51345563 in words is "fifty-one million, three hundred forty-five thousand, five hundred sixty-three".