315401243424251 has 2 divisors, whose sum is σ = 315401243424252. Its totient is φ = 315401243424250.

The previous prime is 315401243424083. The next prime is 315401243424269. The reversal of 315401243424251 is 152424342104513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315401243424251 - 2⁴² = 311003196913147 is a prime.

It is a super-2 number, since 2×315401243424251² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 315401243424199 and 315401243424208.

It is not a weakly prime, because it can be changed into another prime (315401243424271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157700621712125 + 157700621712126.

It is an arithmetic number, because the mean of its divisors is an integer number (157700621712126).

Almost surely, 2^{315401243424251} is an apocalyptic number.

315401243424251 is a deficient number, since it is larger than the sum of its proper divisors (1).

315401243424251 is an equidigital number, since it uses as much as digits as its factorization.

315401243424251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460800, while the sum is 41.

Adding to 315401243424251 its reverse (152424342104513), we get a palindrome (467825585528764).

The spelling of 315401243424251 in words is "three hundred fifteen trillion, four hundred one billion, two hundred forty-three million, four hundred twenty-four thousand, two hundred fifty-one".