51313400497 has 2 divisors, whose sum is σ = 51313400498. Its totient is φ = 51313400496.

The previous prime is 51313400471. The next prime is 51313400561. The reversal of 51313400497 is 79400431315.

51313400497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37389636496 + 13923764001 = 193364^2 + 117999^2 .

It is a cyclic number.

It is not a de Polignac number, because 51313400497 - 2¹¹ = 51313398449 is a prime.

It is not a weakly prime, because it can be changed into another prime (51313403497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25656700248 + 25656700249.

It is an arithmetic number, because the mean of its divisors is an integer number (25656700249).

Almost surely, 2^51313400497 is an apocalyptic number.

It is an amenable number.

51313400497 is a deficient number, since it is larger than the sum of its proper divisors (1).

51313400497 is an equidigital number, since it uses as much as digits as its factorization.

51313400497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 51313400497 in words is "fifty-one billion, three hundred thirteen million, four hundred thousand, four hundred ninety-seven".