323212135440 has 80 divisors (see below), whose sum is σ = 1029037583808. Its totient is φ = 83860443648.

The previous prime is 323212135439. The next prime is 323212135447. The reversal of 323212135440 is 44531212323.

It is a tau number, because it is divible by the number of its divisors (80).

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 = 323212135398 and 323212135407.

It is not an unprimeable number, because it can be changed into a prime (323212135447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18190002 + ... + 18207761.

Almost surely, 2^323212135440 is an apocalyptic number.

323212135440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

323212135440 is an abundant number, since it is smaller than the sum of its proper divisors (705825448368).

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

323212135440 is a wasteful number, since it uses less digits than its factorization.

323212135440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36397816 (or 36397810 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 323212135440 its reverse (44531212323), we get a palindrome (367743347763).

The spelling of 323212135440 in words is "three hundred twenty-three billion, two hundred twelve million, one hundred thirty-five thousand, four hundred forty".