321025332540 has 96 divisors (see below), whose sum is σ = 980723003904. Its totient is φ = 77813487360.

The previous prime is 321025332499. The next prime is 321025332541. The reversal of 321025332540 is 45233520123.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 321025332498 and 321025332507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321025332541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5360442 + ... + 5419998.

It is an arithmetic number, because the mean of its divisors is an integer number (10215864624).

Almost surely, 2^321025332540 is an apocalyptic number.

321025332540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321025332540 is an abundant number, since it is smaller than the sum of its proper divisors (659697671364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321025332540 is a wasteful number, since it uses less digits than its factorization.

321025332540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67747 (or 67745 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

Adding to 321025332540 its reverse (45233520123), we get a palindrome (366258852663).

The spelling of 321025332540 in words is "three hundred twenty-one billion, twenty-five million, three hundred thirty-two thousand, five hundred forty".