315231143 has 2 divisors, whose sum is σ = 315231144. Its totient is φ = 315231142.

The previous prime is 315231127. The next prime is 315231173. The reversal of 315231143 is 341132513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315231143 - 2⁴ = 315231127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315231173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157615571 + 157615572.

It is an arithmetic number, because the mean of its divisors is an integer number (157615572).

Almost surely, 2^315231143 is an apocalyptic number.

315231143 is a deficient number, since it is larger than the sum of its proper divisors (1).

315231143 is an equidigital number, since it uses as much as digits as its factorization.

315231143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 315231143 is about 17754.7498715133. The cubic root of 315231143 is about 680.5755961181.

Adding to 315231143 its reverse (341132513), we get a palindrome (656363656).

The spelling of 315231143 in words is "three hundred fifteen million, two hundred thirty-one thousand, one hundred forty-three".