315445541 has 2 divisors, whose sum is σ = 315445542. Its totient is φ = 315445540.

The previous prime is 315445531. The next prime is 315445547. The reversal of 315445541 is 145544513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268468225 + 46977316 = 16385^2 + 6854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-315445541 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 315445498 and 315445507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315445547) 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, 157722770 + 157722771.

It is an arithmetic number, because the mean of its divisors is an integer number (157722771).

Almost surely, 2^315445541 is an apocalyptic number.

It is an amenable number.

315445541 is a deficient number, since it is larger than the sum of its proper divisors (1).

315445541 is an equidigital number, since it uses as much as digits as its factorization.

315445541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24000, while the sum is 32.

The square root of 315445541 is about 17760.7866098323. The cubic root of 315445541 is about 680.7298543318.

The spelling of 315445541 in words is "three hundred fifteen million, four hundred forty-five thousand, five hundred forty-one".