51903344539 has 2 divisors, whose sum is σ = 51903344540. Its totient is φ = 51903344538.

The previous prime is 51903344533. The next prime is 51903344543. The reversal of 51903344539 is 93544330915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51903344539 - 2⁹ = 51903344027 is a prime.

It is a super-2 number, since 2×51903344539² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51903344533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25951672269 + 25951672270.

It is an arithmetic number, because the mean of its divisors is an integer number (25951672270).

Almost surely, 2^51903344539 is an apocalyptic number.

51903344539 is a deficient number, since it is larger than the sum of its proper divisors (1).

51903344539 is an equidigital number, since it uses as much as digits as its factorization.

51903344539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 874800, while the sum is 46.

The spelling of 51903344539 in words is "fifty-one billion, nine hundred three million, three hundred forty-four thousand, five hundred thirty-nine".