51420355241869 has 2 divisors, whose sum is σ = 51420355241870. Its totient is φ = 51420355241868.

The previous prime is 51420355241821. The next prime is 51420355241933. The reversal of 51420355241869 is 96814255302415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50703471285769 + 716883956100 = 7120637^2 + 846690^2 .

It is a cyclic number.

It is not a de Polignac number, because 51420355241869 - 2³³ = 51411765307277 is a prime.

It is a super-2 number, since 2×51420355241869² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51420355245869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25710177620934 + 25710177620935.

It is an arithmetic number, because the mean of its divisors is an integer number (25710177620935).

Almost surely, 2^{51420355241869} is an apocalyptic number.

It is an amenable number.

51420355241869 is a deficient number, since it is larger than the sum of its proper divisors (1).

51420355241869 is an equidigital number, since it uses as much as digits as its factorization.

51420355241869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368000, while the sum is 55.

The spelling of 51420355241869 in words is "fifty-one trillion, four hundred twenty billion, three hundred fifty-five million, two hundred forty-one thousand, eight hundred sixty-nine".