51518963 has 2 divisors, whose sum is σ = 51518964. Its totient is φ = 51518962.

The previous prime is 51518941. The next prime is 51519007. The reversal of 51518963 is 36981515.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51518963 is a prime.

It is not a weakly prime, because it can be changed into another prime (51518903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25759481 + 25759482.

It is an arithmetic number, because the mean of its divisors is an integer number (25759482).

Almost surely, 2^51518963 is an apocalyptic number.

51518963 is a deficient number, since it is larger than the sum of its proper divisors (1).

51518963 is an equidigital number, since it uses as much as digits as its factorization.

51518963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 38.

The square root of 51518963 is about 7177.6711404187. The cubic root of 51518963 is about 372.0966021713.

The spelling of 51518963 in words is "fifty-one million, five hundred eighteen thousand, nine hundred sixty-three".