315242287 has 2 divisors, whose sum is σ = 315242288. Its totient is φ = 315242286.

The previous prime is 315242233. The next prime is 315242293. The reversal of 315242287 is 782242513.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 315242287 - 2¹¹ = 315240239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315242227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157621143 + 157621144.

It is an arithmetic number, because the mean of its divisors is an integer number (157621144).

Almost surely, 2^315242287 is an apocalyptic number.

315242287 is a deficient number, since it is larger than the sum of its proper divisors (1).

315242287 is an equidigital number, since it uses as much as digits as its factorization.

315242287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 34.

The square root of 315242287 is about 17755.0637002518. The cubic root of 315242287 is about 680.5836158895.

The spelling of 315242287 in words is "three hundred fifteen million, two hundred forty-two thousand, two hundred eighty-seven".