403312213 has 4 divisors (see below), whose sum is σ = 403384108. Its totient is φ = 403240320.

The previous prime is 403312207. The next prime is 403312219. The reversal of 403312213 is 312213304.

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

It is an interprime number because it is at equal distance from previous prime (403312207) and next prime (403312219).

It can be written as a sum of positive squares in 2 ways, for example, as 394538769 + 8773444 = 19863^2 + 2962^2 .

It is a cyclic number.

It is not a de Polignac number, because 403312213 - 2²⁵ = 369757781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (403312219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26748 + ... + 39013.

It is an arithmetic number, because the mean of its divisors is an integer number (100846027).

Almost surely, 2^403312213 is an apocalyptic number.

It is an amenable number.

403312213 is a deficient number, since it is larger than the sum of its proper divisors (71895).

403312213 is an equidigital number, since it uses as much as digits as its factorization.

403312213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71894.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 403312213 is about 20082.6346130183. The cubic root of 403312213 is about 738.8344281625.

Adding to 403312213 its reverse (312213304), we get a palindrome (715525517).

The spelling of 403312213 in words is "four hundred three million, three hundred twelve thousand, two hundred thirteen".