51191963 has 2 divisors, whose sum is σ = 51191964. Its totient is φ = 51191962.

The previous prime is 51191941. The next prime is 51191971. The reversal of 51191963 is 36919115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51191963 - 2²⁴ = 34414747 is a prime.

It is not a weakly prime, because it can be changed into another prime (51191983) 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, 25595981 + 25595982.

It is an arithmetic number, because the mean of its divisors is an integer number (25595982).

Almost surely, 2^51191963 is an apocalyptic number.

51191963 is a deficient number, since it is larger than the sum of its proper divisors (1).

51191963 is an equidigital number, since it uses as much as digits as its factorization.

51191963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7290, while the sum is 35.

The square root of 51191963 is about 7154.8559035106. The cubic root of 51191963 is about 371.3076762715.

The spelling of 51191963 in words is "fifty-one million, one hundred ninety-one thousand, nine hundred sixty-three".