315213014321 has 2 divisors, whose sum is σ = 315213014322. Its totient is φ = 315213014320.

The previous prime is 315213014273. The next prime is 315213014327. The reversal of 315213014321 is 123410312513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230485447921 + 84727566400 = 480089^2 + 291080^2 .

It is a cyclic number.

It is not a de Polignac number, because 315213014321 - 2³⁸ = 40335107377 is a prime.

It is not a weakly prime, because it can be changed into another prime (315213014327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157606507160 + 157606507161.

It is an arithmetic number, because the mean of its divisors is an integer number (157606507161).

Almost surely, 2^315213014321 is an apocalyptic number.

It is an amenable number.

315213014321 is a deficient number, since it is larger than the sum of its proper divisors (1).

315213014321 is an equidigital number, since it uses as much as digits as its factorization.

315213014321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 315213014321 its reverse (123410312513), we get a palindrome (438623326834).

The spelling of 315213014321 in words is "three hundred fifteen billion, two hundred thirteen million, fourteen thousand, three hundred twenty-one".