51430012169 has 2 divisors, whose sum is σ = 51430012170. Its totient is φ = 51430012168.

The previous prime is 51430012147. The next prime is 51430012177. The reversal of 51430012169 is 96121003415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49067566144 + 2362446025 = 221512^2 + 48605^2 .

It is a cyclic number.

It is not a de Polignac number, because 51430012169 - 2¹² = 51430008073 is a prime.

It is a super-2 number, since 2×51430012169² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51430012189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25715006084 + 25715006085.

It is an arithmetic number, because the mean of its divisors is an integer number (25715006085).

Almost surely, 2^51430012169 is an apocalyptic number.

It is an amenable number.

51430012169 is a deficient number, since it is larger than the sum of its proper divisors (1).

51430012169 is an equidigital number, since it uses as much as digits as its factorization.

51430012169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 51430012169 in words is "fifty-one billion, four hundred thirty million, twelve thousand, one hundred sixty-nine".