51451432427 has 2 divisors, whose sum is σ = 51451432428. Its totient is φ = 51451432426.

The previous prime is 51451432421. The next prime is 51451432441. The reversal of 51451432427 is 72423415415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51451432427 - 2⁶ = 51451432363 is a prime.

It is a super-2 number, since 2×51451432427² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51451432421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25725716213 + 25725716214.

It is an arithmetic number, because the mean of its divisors is an integer number (25725716214).

Almost surely, 2^51451432427 is an apocalyptic number.

51451432427 is a deficient number, since it is larger than the sum of its proper divisors (1).

51451432427 is an equidigital number, since it uses as much as digits as its factorization.

51451432427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 38.

The spelling of 51451432427 in words is "fifty-one billion, four hundred fifty-one million, four hundred thirty-two thousand, four hundred twenty-seven".