315133193 has 2 divisors, whose sum is σ = 315133194. Its totient is φ = 315133192.

The previous prime is 315133171. The next prime is 315133213. The reversal of 315133193 is 391331513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200279104 + 114854089 = 14152^2 + 10717^2 .

It is an emirp because it is prime and its reverse (391331513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315133193 - 2¹² = 315129097 is a prime.

It is not a weakly prime, because it can be changed into another prime (315133123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157566596 + 157566597.

It is an arithmetic number, because the mean of its divisors is an integer number (157566597).

Almost surely, 2^315133193 is an apocalyptic number.

It is an amenable number.

315133193 is a deficient number, since it is larger than the sum of its proper divisors (1).

315133193 is an equidigital number, since it uses as much as digits as its factorization.

315133193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3645, while the sum is 29.

The square root of 315133193 is about 17751.9912404215. The cubic root of 315133193 is about 680.5050983402.

The spelling of 315133193 in words is "three hundred fifteen million, one hundred thirty-three thousand, one hundred ninety-three".