315224473 has 2 divisors, whose sum is σ = 315224474. Its totient is φ = 315224472.

The previous prime is 315224449. The next prime is 315224501. The reversal of 315224473 is 374422513.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196784784 + 118439689 = 14028^2 + 10883^2 .

It is an emirp because it is prime and its reverse (374422513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315224473 is a prime.

It is equal to p_17031469 and since 315224473 and 17031469 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (315225473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157612236 + 157612237.

It is an arithmetic number, because the mean of its divisors is an integer number (157612237).

Almost surely, 2^315224473 is an apocalyptic number.

It is an amenable number.

315224473 is a deficient number, since it is larger than the sum of its proper divisors (1).

315224473 is an equidigital number, since it uses as much as digits as its factorization.

315224473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 31.

The square root of 315224473 is about 17754.5620334606. The cubic root of 315224473 is about 680.5707959672.

Adding to 315224473 its reverse (374422513), we get a palindrome (689646986).

The spelling of 315224473 in words is "three hundred fifteen million, two hundred twenty-four thousand, four hundred seventy-three".