315135043123 has 2 divisors, whose sum is σ = 315135043124. Its totient is φ = 315135043122.

The previous prime is 315135043117. The next prime is 315135043129. The reversal of 315135043123 is 321340531513.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (315135043117) and next prime (315135043129).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315135043123 is a prime.

It is not a weakly prime, because it can be changed into another prime (315135043129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157567521561 + 157567521562.

It is an arithmetic number, because the mean of its divisors is an integer number (157567521562).

Almost surely, 2^315135043123 is an apocalyptic number.

315135043123 is a deficient number, since it is larger than the sum of its proper divisors (1).

315135043123 is an equidigital number, since it uses as much as digits as its factorization.

315135043123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 31.

Adding to 315135043123 its reverse (321340531513), we get a palindrome (636475574636).

The spelling of 315135043123 in words is "three hundred fifteen billion, one hundred thirty-five million, forty-three thousand, one hundred twenty-three".