51315503401 has 2 divisors, whose sum is σ = 51315503402. Its totient is φ = 51315503400.

The previous prime is 51315503383. The next prime is 51315503429. The reversal of 51315503401 is 10430551315.

51315503401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (51315503429) can be obtained adding 51315503401 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34270895376 + 17044608025 = 185124^2 + 130555^2 .

It is a cyclic number.

It is not a de Polignac number, because 51315503401 - 2¹⁹ = 51314979113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51315503401.

It is not a weakly prime, because it can be changed into another prime (51315503431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25657751700 + 25657751701.

It is an arithmetic number, because the mean of its divisors is an integer number (25657751701).

Almost surely, 2^51315503401 is an apocalyptic number.

It is an amenable number.

51315503401 is a deficient number, since it is larger than the sum of its proper divisors (1).

51315503401 is an equidigital number, since it uses as much as digits as its factorization.

51315503401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 28.

The spelling of 51315503401 in words is "fifty-one billion, three hundred fifteen million, five hundred three thousand, four hundred one".