315284251 has 2 divisors, whose sum is σ = 315284252. Its totient is φ = 315284250.

The previous prime is 315284239. The next prime is 315284267. The reversal of 315284251 is 152482513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 315284251 - 2²¹ = 313187099 is a prime.

It is not a weakly prime, because it can be changed into another prime (315284551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157642125 + 157642126.

It is an arithmetic number, because the mean of its divisors is an integer number (157642126).

Almost surely, 2^315284251 is an apocalyptic number.

315284251 is a deficient number, since it is larger than the sum of its proper divisors (1).

315284251 is an equidigital number, since it uses as much as digits as its factorization.

315284251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 31.

The square root of 315284251 is about 17756.2454083063. The cubic root of 315284251 is about 680.6138135553.

The spelling of 315284251 in words is "three hundred fifteen million, two hundred eighty-four thousand, two hundred fifty-one".