315231531043 has 16 divisors (see below), whose sum is σ = 386443766016. Its totient is φ = 253028651040.

The previous prime is 315231531001. The next prime is 315231531053. The reversal of 315231531043 is 340135132513.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-315231531043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 315231530996 and 315231531014.

It is not an unprimeable number, because it can be changed into a prime (315231531053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47918805 + ... + 47925382.

It is an arithmetic number, because the mean of its divisors is an integer number (24152735376).

Almost surely, 2^315231531043 is an apocalyptic number.

315231531043 is a deficient number, since it is larger than the sum of its proper divisors (71212234973).

315231531043 is a wasteful number, since it uses less digits than its factorization.

315231531043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95844234.

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

Adding to 315231531043 its reverse (340135132513), we get a palindrome (655366663556).

The spelling of 315231531043 in words is "three hundred fifteen billion, two hundred thirty-one million, five hundred thirty-one thousand, forty-three".