321145432 has 8 divisors (see below), whose sum is σ = 602147700. Its totient is φ = 160572712.

The previous prime is 321145411. The next prime is 321145439. The reversal of 321145432 is 234541123.

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

It is a super-3 number, since 3×321145432³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321145397 and 321145406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321145439) 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 as a sum of consecutive naturals, namely, 20071582 + ... + 20071597.

Almost surely, 2^321145432 is an apocalyptic number.

It is an amenable number.

321145432 is a deficient number, since it is larger than the sum of its proper divisors (281002268).

321145432 is a wasteful number, since it uses less digits than its factorization.

321145432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40143185 (or 40143181 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 321145432 is about 17920.5310189179. The cubic root of 321145432 is about 684.8055156757.

Adding to 321145432 its reverse (234541123), we get a palindrome (555686555).

The spelling of 321145432 in words is "three hundred twenty-one million, one hundred forty-five thousand, four hundred thirty-two".