315021449 has 2 divisors, whose sum is σ = 315021450. Its totient is φ = 315021448.

The previous prime is 315021439. The next prime is 315021479. The reversal of 315021449 is 944120513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306495049 + 8526400 = 17507^2 + 2920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315021449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (315021419) 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, 157510724 + 157510725.

It is an arithmetic number, because the mean of its divisors is an integer number (157510725).

Almost surely, 2^315021449 is an apocalyptic number.

It is an amenable number.

315021449 is a deficient number, since it is larger than the sum of its proper divisors (1).

315021449 is an equidigital number, since it uses as much as digits as its factorization.

315021449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 315021449 is about 17748.8435961332. The cubic root of 315021449 is about 680.4246547339.

The spelling of 315021449 in words is "three hundred fifteen million, twenty-one thousand, four hundred forty-nine".