51215428843 has 2 divisors, whose sum is σ = 51215428844. Its totient is φ = 51215428842.

The previous prime is 51215428837. The next prime is 51215428883. The reversal of 51215428843 is 34882451215.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51215428843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51215428843.

It is not a weakly prime, because it can be changed into another prime (51215428883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25607714421 + 25607714422.

It is an arithmetic number, because the mean of its divisors is an integer number (25607714422).

Almost surely, 2^51215428843 is an apocalyptic number.

51215428843 is a deficient number, since it is larger than the sum of its proper divisors (1).

51215428843 is an equidigital number, since it uses as much as digits as its factorization.

51215428843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 307200, while the sum is 43.

The spelling of 51215428843 in words is "fifty-one billion, two hundred fifteen million, four hundred twenty-eight thousand, eight hundred forty-three".