321445372 has 12 divisors (see below), whose sum is σ = 562768416. Its totient is φ = 160654400.

The previous prime is 321445351. The next prime is 321445379. The reversal of 321445372 is 273544123.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321445379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5629 + ... + 25972.

It is an arithmetic number, because the mean of its divisors is an integer number (46897368).

Almost surely, 2^321445372 is an apocalyptic number.

It is an amenable number.

321445372 is a deficient number, since it is larger than the sum of its proper divisors (241323044).

321445372 is a wasteful number, since it uses less digits than its factorization.

321445372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34148 (or 34146 counting only the distinct ones).

The product of its digits is 20160, while the sum is 31.

The square root of 321445372 is about 17928.8976794448. The cubic root of 321445372 is about 685.0186451316.

Adding to 321445372 its reverse (273544123), we get a palindrome (594989495).

The spelling of 321445372 in words is "three hundred twenty-one million, four hundred forty-five thousand, three hundred seventy-two".