323220421 has 8 divisors (see below), whose sum is σ = 328050584. Its totient is φ = 318401280.

The previous prime is 323220413. The next prime is 323220427. The reversal of 323220421 is 124022323.

It can be written as a sum of positive squares in 4 ways, for example, as 94303521 + 228916900 = 9711^2 + 15130^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 323220421 - 2³ = 323220413 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 (323220427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70561 + ... + 75001.

It is an arithmetic number, because the mean of its divisors is an integer number (41006323).

Almost surely, 2^323220421 is an apocalyptic number.

It is an amenable number.

323220421 is a deficient number, since it is larger than the sum of its proper divisors (4830163).

323220421 is an equidigital number, since it uses as much as digits as its factorization.

323220421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5511.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 323220421 is about 17978.3319860325. The cubic root of 323220421 is about 686.2772419049.

Adding to 323220421 its reverse (124022323), we get a palindrome (447242744).

It can be divided in two parts, 3232 and 20421, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 323220421 in words is "three hundred twenty-three million, two hundred twenty thousand, four hundred twenty-one".