51513030043 has 2 divisors, whose sum is σ = 51513030044. Its totient is φ = 51513030042.

The previous prime is 51513030031. The next prime is 51513030067. The reversal of 51513030043 is 34003031515.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51513030043 - 2¹³ = 51513021851 is a prime.

It is a super-2 number, since 2×51513030043² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51513030073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25756515021 + 25756515022.

It is an arithmetic number, because the mean of its divisors is an integer number (25756515022).

Almost surely, 2^51513030043 is an apocalyptic number.

51513030043 is a deficient number, since it is larger than the sum of its proper divisors (1).

51513030043 is an equidigital number, since it uses as much as digits as its factorization.

51513030043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 51513030043 its reverse (34003031515), we get a palindrome (85516061558).

The spelling of 51513030043 in words is "fifty-one billion, five hundred thirteen million, thirty thousand, forty-three".