313220403 has 6 divisors (see below), whose sum is σ = 452429484. Its totient is φ = 208813596.

The previous prime is 313220399. The next prime is 313220419. The reversal of 313220403 is 304022313.

It is not a de Polignac number, because 313220403 - 2² = 313220399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (313220423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17401125 + ... + 17401142.

It is an arithmetic number, because the mean of its divisors is an integer number (75404914).

Almost surely, 2^313220403 is an apocalyptic number.

313220403 is a deficient number, since it is larger than the sum of its proper divisors (139209081).

313220403 is a wasteful number, since it uses less digits than its factorization.

313220403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34802273 (or 34802270 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 313220403 is about 17698.0338738516. The cubic root of 313220403 is about 679.1254638476.

Adding to 313220403 its reverse (304022313), we get a palindrome (617242716).

The spelling of 313220403 in words is "three hundred thirteen million, two hundred twenty thousand, four hundred three".