315044549 has 2 divisors, whose sum is σ = 315044550. Its totient is φ = 315044548.

The previous prime is 315044507. The next prime is 315044551. The reversal of 315044549 is 945440513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303003649 + 12040900 = 17407^2 + 3470^2 .

It is a cyclic number.

It is not a de Polignac number, because 315044549 - 2⁸ = 315044293 is a prime.

It is a super-2 number, since 2×315044549² = 198506135709226802, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 315044551, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315044579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157522274 + 157522275.

It is an arithmetic number, because the mean of its divisors is an integer number (157522275).

Almost surely, 2^315044549 is an apocalyptic number.

It is an amenable number.

315044549 is a deficient number, since it is larger than the sum of its proper divisors (1).

315044549 is an equidigital number, since it uses as much as digits as its factorization.

315044549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 315044549 is about 17749.4943308253. The cubic root of 315044549 is about 680.4412857976.

The spelling of 315044549 in words is "three hundred fifteen million, forty-four thousand, five hundred forty-nine".