51431345123 has 2 divisors, whose sum is σ = 51431345124. Its totient is φ = 51431345122.

The previous prime is 51431344999. The next prime is 51431345149. The reversal of 51431345123 is 32154313415.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51431345123 - 2¹⁶ = 51431279587 is a prime.

It is a super-2 number, since 2×51431345123² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51431345123.

It is not a weakly prime, because it can be changed into another prime (51431345323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25715672561 + 25715672562.

It is an arithmetic number, because the mean of its divisors is an integer number (25715672562).

Almost surely, 2^51431345123 is an apocalyptic number.

51431345123 is a deficient number, since it is larger than the sum of its proper divisors (1).

51431345123 is an equidigital number, since it uses as much as digits as its factorization.

51431345123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

Adding to 51431345123 its reverse (32154313415), we get a palindrome (83585658538).

The spelling of 51431345123 in words is "fifty-one billion, four hundred thirty-one million, three hundred forty-five thousand, one hundred twenty-three".