51543425429 has 2 divisors, whose sum is σ = 51543425430. Its totient is φ = 51543425428.

The previous prime is 51543425399. The next prime is 51543425447. The reversal of 51543425429 is 92452434515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50306004100 + 1237421329 = 224290^2 + 35177^2 .

It is a cyclic number.

It is not a de Polignac number, because 51543425429 - 2⁸ = 51543425173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51543425429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51543425629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25771712714 + 25771712715.

It is an arithmetic number, because the mean of its divisors is an integer number (25771712715).

Almost surely, 2^51543425429 is an apocalyptic number.

It is an amenable number.

51543425429 is a deficient number, since it is larger than the sum of its proper divisors (1).

51543425429 is an equidigital number, since it uses as much as digits as its factorization.

51543425429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864000, while the sum is 44.

The spelling of 51543425429 in words is "fifty-one billion, five hundred forty-three million, four hundred twenty-five thousand, four hundred twenty-nine".