313216478 has 4 divisors (see below), whose sum is σ = 469824720. Its totient is φ = 156608238.

The previous prime is 313216469. The next prime is 313216481. The reversal of 313216478 is 874612313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874612313 = 19 ⋅46032227.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78304118 + ... + 78304121.

It is an arithmetic number, because the mean of its divisors is an integer number (117456180).

Almost surely, 2^313216478 is an apocalyptic number.

313216478 is a deficient number, since it is larger than the sum of its proper divisors (156608242).

313216478 is a wasteful number, since it uses less digits than its factorization.

313216478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156608241.

The product of its digits is 24192, while the sum is 35.

The square root of 313216478 is about 17697.9229854805. The cubic root of 313216478 is about 679.1226271033.

The spelling of 313216478 in words is "three hundred thirteen million, two hundred sixteen thousand, four hundred seventy-eight".