51243019039 has 2 divisors, whose sum is σ = 51243019040. Its totient is φ = 51243019038.

The previous prime is 51243019033. The next prime is 51243019043. The reversal of 51243019039 is 93091034215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51243019039 - 2³³ = 42653084447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51243018989 and 51243019007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51243019033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25621509519 + 25621509520.

It is an arithmetic number, because the mean of its divisors is an integer number (25621509520).

Almost surely, 2^51243019039 is an apocalyptic number.

51243019039 is a deficient number, since it is larger than the sum of its proper divisors (1).

51243019039 is an equidigital number, since it uses as much as digits as its factorization.

51243019039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 37.

The spelling of 51243019039 in words is "fifty-one billion, two hundred forty-three million, nineteen thousand, thirty-nine".