315021361 has 2 divisors, whose sum is σ = 315021362. Its totient is φ = 315021360.

The previous prime is 315021299. The next prime is 315021419. The reversal of 315021361 is 163120513.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240095025 + 74926336 = 15495^2 + 8656^2 .

It is a cyclic number.

It is not a de Polignac number, because 315021361 - 2⁷ = 315021233 is a prime.

It is not a weakly prime, because it can be changed into another prime (315021661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157510680 + 157510681.

It is an arithmetic number, because the mean of its divisors is an integer number (157510681).

Almost surely, 2^315021361 is an apocalyptic number.

It is an amenable number.

315021361 is a deficient number, since it is larger than the sum of its proper divisors (1).

315021361 is an equidigital number, since it uses as much as digits as its factorization.

315021361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 315021361 is about 17748.8411170983. The cubic root of 315021361 is about 680.4245913759.

Adding to 315021361 its reverse (163120513), we get a palindrome (478141874).

The spelling of 315021361 in words is "three hundred fifteen million, twenty-one thousand, three hundred sixty-one".