51430517 has 2 divisors, whose sum is σ = 51430518. Its totient is φ = 51430516.

The previous prime is 51430499. The next prime is 51430529. The reversal of 51430517 is 71503415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51351556 + 78961 = 7166^2 + 281^2 .

It is a cyclic number.

It is not a de Polignac number, because 51430517 - 2⁶ = 51430453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51430567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25715258 + 25715259.

It is an arithmetic number, because the mean of its divisors is an integer number (25715259).

Almost surely, 2^51430517 is an apocalyptic number.

It is an amenable number.

51430517 is a deficient number, since it is larger than the sum of its proper divisors (1).

51430517 is an equidigital number, since it uses as much as digits as its factorization.

51430517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 51430517 is about 7171.5073032104. The cubic root of 51430517 is about 371.8835459468.

The spelling of 51430517 in words is "fifty-one million, four hundred thirty thousand, five hundred seventeen".