315233143 has 2 divisors, whose sum is σ = 315233144. Its totient is φ = 315233142.

The previous prime is 315233137. The next prime is 315233167. The reversal of 315233143 is 341332513.

It is a weak prime.

It is an emirp because it is prime and its reverse (341332513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315233143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315231143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157616571 + 157616572.

It is an arithmetic number, because the mean of its divisors is an integer number (157616572).

Almost surely, 2^315233143 is an apocalyptic number.

315233143 is a deficient number, since it is larger than the sum of its proper divisors (1).

315233143 is an equidigital number, since it uses as much as digits as its factorization.

315233143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 25.

The square root of 315233143 is about 17754.8061943802. The cubic root of 315233143 is about 680.5770354306.

Adding to 315233143 its reverse (341332513), we get a palindrome (656565656).

The spelling of 315233143 in words is "three hundred fifteen million, two hundred thirty-three thousand, one hundred forty-three".