320555541 has 4 divisors (see below), whose sum is σ = 427407392. Its totient is φ = 213703692.

The previous prime is 320555533. The next prime is 320555551. The reversal of 320555541 is 145555023.

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, and also an emirpimes, since its reverse is a distinct semiprime: 145555023 = 3 ⋅48518341.

It is not a de Polignac number, because 320555541 - 2³ = 320555533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 320555499 and 320555508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320555551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53425921 + ... + 53425926.

It is an arithmetic number, because the mean of its divisors is an integer number (106851848).

Almost surely, 2^320555541 is an apocalyptic number.

It is an amenable number.

320555541 is a deficient number, since it is larger than the sum of its proper divisors (106851851).

320555541 is a wasteful number, since it uses less digits than its factorization.

320555541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106851850.

The product of its (nonzero) digits is 15000, while the sum is 30.

The square root of 320555541 is about 17904.0649295069. The cubic root of 320555541 is about 684.3859672311.

The spelling of 320555541 in words is "three hundred twenty million, five hundred fifty-five thousand, five hundred forty-one".