323440330421 has 12 divisors (see below), whose sum is σ = 350298113220. Its totient is φ = 298505825280.

The previous prime is 323440330373. The next prime is 323440330469. The reversal of 323440330421 is 124033044323.

It is an interprime number because it is at equal distance from previous prime (323440330373) and next prime (323440330469).

It can be written as a sum of positive squares in 6 ways, for example, as 212608599025 + 110831731396 = 461095^2 + 332914^2 .

It is a de Polignac number, because none of the positive numbers 2^k-323440330421 is a prime.

It is a super-2 number, since 2×323440330421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323440330471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 769331 + ... + 1112991.

It is an arithmetic number, because the mean of its divisors is an integer number (29191509435).

Almost surely, 2^323440330421 is an apocalyptic number.

It is an amenable number.

323440330421 is a deficient number, since it is larger than the sum of its proper divisors (26857782799).

323440330421 is a wasteful number, since it uses less digits than its factorization.

323440330421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349256 (or 349243 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 323440330421 its reverse (124033044323), we get a palindrome (447473374744).

The spelling of 323440330421 in words is "three hundred twenty-three billion, four hundred forty million, three hundred thirty thousand, four hundred twenty-one".