313317506 has 4 divisors (see below), whose sum is σ = 469976262. Its totient is φ = 156658752.

The previous prime is 313317491. The next prime is 313317541. The reversal of 313317506 is 605713313.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605713313 = 1951 ⋅310463.

It can be written as a sum of positive squares in only one way, i.e., 298425625 + 14891881 = 17275^2 + 3859^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78329375 + ... + 78329378.

Almost surely, 2^313317506 is an apocalyptic number.

313317506 is a deficient number, since it is larger than the sum of its proper divisors (156658756).

313317506 is a wasteful number, since it uses less digits than its factorization.

313317506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156658755.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 313317506 is about 17700.7769885957. The cubic root of 313317506 is about 679.1956362733.

The spelling of 313317506 in words is "three hundred thirteen million, three hundred seventeen thousand, five hundred six".