51420434651 has 2 divisors, whose sum is σ = 51420434652. Its totient is φ = 51420434650.

The previous prime is 51420434629. The next prime is 51420434683. The reversal of 51420434651 is 15643402415.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51420434651 is a prime.

It is a super-2 number, since 2×51420434651² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51420434851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25710217325 + 25710217326.

It is an arithmetic number, because the mean of its divisors is an integer number (25710217326).

Almost surely, 2^51420434651 is an apocalyptic number.

51420434651 is a deficient number, since it is larger than the sum of its proper divisors (1).

51420434651 is an equidigital number, since it uses as much as digits as its factorization.

51420434651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 35.

The spelling of 51420434651 in words is "fifty-one billion, four hundred twenty million, four hundred thirty-four thousand, six hundred fifty-one".