315121043 has 2 divisors, whose sum is σ = 315121044. Its totient is φ = 315121042.

The previous prime is 315121031. The next prime is 315121063. The reversal of 315121043 is 340121513.

It is an a-pointer prime, because the next prime (315121063) can be obtained adding 315121043 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315121043 - 2⁶ = 315120979 is a prime.

It is not a weakly prime, because it can be changed into another prime (315121013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157560521 + 157560522.

It is an arithmetic number, because the mean of its divisors is an integer number (157560522).

Almost surely, 2^315121043 is an apocalyptic number.

315121043 is a deficient number, since it is larger than the sum of its proper divisors (1).

315121043 is an equidigital number, since it uses as much as digits as its factorization.

315121043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 315121043 is about 17751.6490219923. The cubic root of 315121043 is about 680.4963525745.

Adding to 315121043 its reverse (340121513), we get a palindrome (655242556).

The spelling of 315121043 in words is "three hundred fifteen million, one hundred twenty-one thousand, forty-three".