320433421 has 16 divisors (see below), whose sum is σ = 401909760. Its totient is φ = 248183280.

The previous prime is 320433419. The next prime is 320433457. The reversal of 320433421 is 124334023.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 320433421 - 2¹ = 320433419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320433392 and 320433401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320433481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 400 + ... + 25318.

It is an arithmetic number, because the mean of its divisors is an integer number (25119360).

Almost surely, 2^320433421 is an apocalyptic number.

It is an amenable number.

320433421 is a deficient number, since it is larger than the sum of its proper divisors (81476339).

320433421 is a wasteful number, since it uses less digits than its factorization.

320433421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25104.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 320433421 is about 17900.6542059222. The cubic root of 320433421 is about 684.2990474734.

Adding to 320433421 its reverse (124334023), we get a palindrome (444767444).

The spelling of 320433421 in words is "three hundred twenty million, four hundred thirty-three thousand, four hundred twenty-one".