51340049 has 2 divisors, whose sum is σ = 51340050. Its totient is φ = 51340048.

The previous prime is 51340031. The next prime is 51340057. The reversal of 51340049 is 94004315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42667024 + 8673025 = 6532^2 + 2945^2 .

It is a cyclic number.

It is not a de Polignac number, because 51340049 - 2⁸ = 51339793 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51340249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25670024 + 25670025.

It is an arithmetic number, because the mean of its divisors is an integer number (25670025).

Almost surely, 2^51340049 is an apocalyptic number.

It is an amenable number.

51340049 is a deficient number, since it is larger than the sum of its proper divisors (1).

51340049 is an equidigital number, since it uses as much as digits as its factorization.

51340049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 51340049 is about 7165.1970663758. The cubic root of 51340049 is about 371.6653661020.

The spelling of 51340049 in words is "fifty-one million, three hundred forty thousand, forty-nine".