321440552 has 8 divisors (see below), whose sum is σ = 602701050. Its totient is φ = 160720272.

The previous prime is 321440551. The next prime is 321440557. The reversal of 321440552 is 255044123.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 168324676 + 153115876 = 12974^2 + 12374^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (321440551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20090027 + ... + 20090042.

Almost surely, 2^321440552 is an apocalyptic number.

It is an amenable number.

321440552 is a deficient number, since it is larger than the sum of its proper divisors (281260498).

321440552 is a wasteful number, since it uses less digits than its factorization.

321440552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40180075 (or 40180071 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 321440552 is about 17928.7632590762. The cubic root of 321440552 is about 685.0152212150.

Adding to 321440552 its reverse (255044123), we get a palindrome (576484675).

The spelling of 321440552 in words is "three hundred twenty-one million, four hundred forty thousand, five hundred fifty-two".