51254214509 has 2 divisors, whose sum is σ = 51254214510. Its totient is φ = 51254214508.

The previous prime is 51254214491. The next prime is 51254214527. The reversal of 51254214509 is 90541245215.

It is a balanced prime because it is at equal distance from previous prime (51254214491) and next prime (51254214527).

It can be written as a sum of positive squares in only one way, i.e., 37746661225 + 13507553284 = 194285^2 + 116222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51254214509 is a prime.

It is a super-2 number, since 2×51254214509² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51254214569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25627107254 + 25627107255.

It is an arithmetic number, because the mean of its divisors is an integer number (25627107255).

Almost surely, 2^51254214509 is an apocalyptic number.

It is an amenable number.

51254214509 is a deficient number, since it is larger than the sum of its proper divisors (1).

51254214509 is an equidigital number, since it uses as much as digits as its factorization.

51254214509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72000, while the sum is 38.

The spelling of 51254214509 in words is "fifty-one billion, two hundred fifty-four million, two hundred fourteen thousand, five hundred nine".