51431432893 has 2 divisors, whose sum is σ = 51431432894. Its totient is φ = 51431432892.

The previous prime is 51431432891. The next prime is 51431432947. The reversal of 51431432893 is 39823413415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50051533284 + 1379899609 = 223722^2 + 37147^2 .

It is a cyclic number.

It is not a de Polignac number, because 51431432893 - 2¹ = 51431432891 is a prime.

Together with 51431432891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51431432891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25715716446 + 25715716447.

It is an arithmetic number, because the mean of its divisors is an integer number (25715716447).

Almost surely, 2^51431432893 is an apocalyptic number.

It is an amenable number.

51431432893 is a deficient number, since it is larger than the sum of its proper divisors (1).

51431432893 is an equidigital number, since it uses as much as digits as its factorization.

51431432893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 43.

The spelling of 51431432893 in words is "fifty-one billion, four hundred thirty-one million, four hundred thirty-two thousand, eight hundred ninety-three".