313213403 has 4 divisors (see below), whose sum is σ = 313559640. Its totient is φ = 312867168.

The previous prime is 313213357. The next prime is 313213489. The reversal of 313213403 is 304312313.

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

It is a cyclic number.

It is not a de Polignac number, because 313213403 - 2¹⁰ = 313212379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313213493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171758 + ... + 173571.

It is an arithmetic number, because the mean of its divisors is an integer number (78389910).

Almost surely, 2^313213403 is an apocalyptic number.

313213403 is a deficient number, since it is larger than the sum of its proper divisors (346237).

313213403 is an equidigital number, since it uses as much as digits as its factorization.

313213403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346236.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 313213403 is about 17697.8361106662. The cubic root of 313213403 is about 679.1204046692.

Adding to 313213403 its reverse (304312313), we get a palindrome (617525716).

The spelling of 313213403 in words is "three hundred thirteen million, two hundred thirteen thousand, four hundred three".