51442097747 has 2 divisors, whose sum is σ = 51442097748. Its totient is φ = 51442097746.

The previous prime is 51442097723. The next prime is 51442097753. The reversal of 51442097747 is 74779024415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51442097747 - 2²² = 51437903443 is a prime.

It is a super-2 number, since 2×51442097747² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51442097695 and 51442097704.

It is not a weakly prime, because it can be changed into another prime (51442097797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25721048873 + 25721048874.

It is an arithmetic number, because the mean of its divisors is an integer number (25721048874).

Almost surely, 2^51442097747 is an apocalyptic number.

51442097747 is a deficient number, since it is larger than the sum of its proper divisors (1).

51442097747 is an equidigital number, since it uses as much as digits as its factorization.

51442097747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1975680, while the sum is 50.

The spelling of 51442097747 in words is "fifty-one billion, four hundred forty-two million, ninety-seven thousand, seven hundred forty-seven".