317213247 has 16 divisors (see below), whose sum is σ = 467798240. Its totient is φ = 189931392.

The previous prime is 317213243. The next prime is 317213249. The reversal of 317213247 is 742312713.

It is not a de Polignac number, because 317213247 - 2² = 317213243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (317213243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108472 + ... + 111357.

It is an arithmetic number, because the mean of its divisors is an integer number (29237390).

Almost surely, 2^317213247 is an apocalyptic number.

317213247 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

317213247 is a deficient number, since it is larger than the sum of its proper divisors (150584993).

317213247 is a wasteful number, since it uses less digits than its factorization.

317213247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219882.

The product of its digits is 7056, while the sum is 30.

The square root of 317213247 is about 17810.4813803558. The cubic root of 317213247 is about 681.9990532977. Note that the first 3 decimals are identical.

The spelling of 317213247 in words is "three hundred seventeen million, two hundred thirteen thousand, two hundred forty-seven".