51340255919 has 2 divisors, whose sum is σ = 51340255920. Its totient is φ = 51340255918.

The previous prime is 51340255913. The next prime is 51340255951. The reversal of 51340255919 is 91955204315.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51340255919 is a prime.

It is a super-2 number, since 2×51340255919² (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 51340255919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51340255913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25670127959 + 25670127960.

It is an arithmetic number, because the mean of its divisors is an integer number (25670127960).

Almost surely, 2^51340255919 is an apocalyptic number.

51340255919 is a deficient number, since it is larger than the sum of its proper divisors (1).

51340255919 is an equidigital number, since it uses as much as digits as its factorization.

51340255919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 44.

The spelling of 51340255919 in words is "fifty-one billion, three hundred forty million, two hundred fifty-five thousand, nine hundred nineteen".