315545123 has 2 divisors, whose sum is σ = 315545124. Its totient is φ = 315545122.

The previous prime is 315545107. The next prime is 315545147. The reversal of 315545123 is 321545513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315545123 - 2⁴ = 315545107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (315545183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157772561 + 157772562.

It is an arithmetic number, because the mean of its divisors is an integer number (157772562).

Almost surely, 2^315545123 is an apocalyptic number.

315545123 is a deficient number, since it is larger than the sum of its proper divisors (1).

315545123 is an equidigital number, since it uses as much as digits as its factorization.

315545123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 29.

The square root of 315545123 is about 17763.5898117469. The cubic root of 315545123 is about 680.8014792765.

The spelling of 315545123 in words is "three hundred fifteen million, five hundred forty-five thousand, one hundred twenty-three".