323400521 has 4 divisors (see below), whose sum is σ = 323491200. Its totient is φ = 323309844.

The previous prime is 323400509. The next prime is 323400523. The reversal of 323400521 is 125004323.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 323400521 - 2¹⁰ = 323399497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 323400493 and 323400502.

It is not an unprimeable number, because it can be changed into a prime (323400523) 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, 39761 + ... + 47198.

It is an arithmetic number, because the mean of its divisors is an integer number (80872800).

Almost surely, 2^323400521 is an apocalyptic number.

It is an amenable number.

323400521 is a deficient number, since it is larger than the sum of its proper divisors (90679).

323400521 is an equidigital number, since it uses as much as digits as its factorization.

323400521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90678.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 323400521 is about 17983.3400957664. The cubic root of 323400521 is about 686.4046839164.

Adding to 323400521 its reverse (125004323), we get a palindrome (448404844).

The spelling of 323400521 in words is "three hundred twenty-three million, four hundred thousand, five hundred twenty-one".