317218442 has 4 divisors (see below), whose sum is σ = 475827666. Its totient is φ = 158609220.

The previous prime is 317218411. The next prime is 317218469. The reversal of 317218442 is 244812713.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 299670721 + 17547721 = 17311^2 + 4189^2 .

It is a junction number, because it is equal to n+sod(n) for n = 317218399 and 317218408.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79304609 + ... + 79304612.

Almost surely, 2^317218442 is an apocalyptic number.

317218442 is a deficient number, since it is larger than the sum of its proper divisors (158609224).

317218442 is a wasteful number, since it uses less digits than its factorization.

317218442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158609223.

The product of its digits is 10752, while the sum is 32.

The square root of 317218442 is about 17810.6272208477. The cubic root of 317218442 is about 682.0027763093.

The spelling of 317218442 in words is "three hundred seventeen million, two hundred eighteen thousand, four hundred forty-two".