315421273 has 2 divisors, whose sum is σ = 315421274. Its totient is φ = 315421272.

The previous prime is 315421237. The next prime is 315421289. The reversal of 315421273 is 372124513.

Together with previous prime (315421237) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 315311049 + 110224 = 17757^2 + 332^2 .

It is an emirp because it is prime and its reverse (372124513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315421273 - 2⁹ = 315420761 is a prime.

It is not a weakly prime, because it can be changed into another prime (315421573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157710636 + 157710637.

It is an arithmetic number, because the mean of its divisors is an integer number (157710637).

Almost surely, 2^315421273 is an apocalyptic number.

It is an amenable number.

315421273 is a deficient number, since it is larger than the sum of its proper divisors (1).

315421273 is an equidigital number, since it uses as much as digits as its factorization.

315421273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 28.

The square root of 315421273 is about 17760.1034062305. The cubic root of 315421273 is about 680.7123971444.

Adding to 315421273 its reverse (372124513), we get a palindrome (687545786).

The spelling of 315421273 in words is "three hundred fifteen million, four hundred twenty-one thousand, two hundred seventy-three".