51201100043 has 2 divisors, whose sum is σ = 51201100044. Its totient is φ = 51201100042.

The previous prime is 51201100039. The next prime is 51201100057. The reversal of 51201100043 is 34000110215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51201100043 - 2² = 51201100039 is a prime.

It is a super-2 number, since 2×51201100043² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51201099994 and 51201100030.

It is not a weakly prime, because it can be changed into another prime (51201100033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25600550021 + 25600550022.

It is an arithmetic number, because the mean of its divisors is an integer number (25600550022).

Almost surely, 2^51201100043 is an apocalyptic number.

51201100043 is a deficient number, since it is larger than the sum of its proper divisors (1).

51201100043 is an equidigital number, since it uses as much as digits as its factorization.

51201100043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 51201100043 its reverse (34000110215), we get a palindrome (85201210258).

The spelling of 51201100043 in words is "fifty-one billion, two hundred one million, one hundred thousand, forty-three".