321045530 has 16 divisors (see below), whose sum is σ = 622334664. Its totient is φ = 118539840.

The previous prime is 321045521. The next prime is 321045533. The reversal of 321045530 is 35540123.

It can be written as a sum of positive squares in 4 ways, for example, as 264810529 + 56235001 = 16273^2 + 7499^2 .

It is a junction number, because it is equal to n+sod(n) for n = 321045496 and 321045505.

It is not an unprimeable number, because it can be changed into a prime (321045533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1234661 + ... + 1234920.

Almost surely, 2^321045530 is an apocalyptic number.

321045530 is a deficient number, since it is larger than the sum of its proper divisors (301289134).

321045530 is a wasteful number, since it uses less digits than its factorization.

321045530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469601.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 321045530 is about 17917.7434405117. The cubic root of 321045530 is about 684.7344984884.

Adding to 321045530 its reverse (35540123), we get a palindrome (356585653).

The spelling of 321045530 in words is "three hundred twenty-one million, forty-five thousand, five hundred thirty".