51421132340447 has 2 divisors, whose sum is σ = 51421132340448. Its totient is φ = 51421132340446.

The previous prime is 51421132340411. The next prime is 51421132340549. The reversal of 51421132340447 is 74404323112415.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51421132340447 - 2³⁶ = 51352412863711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51421132340947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25710566170223 + 25710566170224.

It is an arithmetic number, because the mean of its divisors is an integer number (25710566170224).

Almost surely, 2^{51421132340447} is an apocalyptic number.

51421132340447 is a deficient number, since it is larger than the sum of its proper divisors (1).

51421132340447 is an equidigital number, since it uses as much as digits as its factorization.

51421132340447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 51421132340447 in words is "fifty-one trillion, four hundred twenty-one billion, one hundred thirty-two million, three hundred forty thousand, four hundred forty-seven".