213231322140 has 48 divisors (see below), whose sum is σ = 604605281280. Its totient is φ = 56141916480.

The previous prime is 213231322123. The next prime is 213231322247. The reversal of 213231322140 is 41223132312.

It is a self number, because there is not a number n which added to its sum of digits gives 213231322140.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22488016 + ... + 22497495.

It is an arithmetic number, because the mean of its divisors is an integer number (12595943360).

Almost surely, 2^213231322140 is an apocalyptic number.

213231322140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213231322140 is an abundant number, since it is smaller than the sum of its proper divisors (391373959140).

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

213231322140 is a wasteful number, since it uses less digits than its factorization.

213231322140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44985602 (or 44985600 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 213231322140 its reverse (41223132312), we get a palindrome (254454454452).

The spelling of 213231322140 in words is "two hundred thirteen billion, two hundred thirty-one million, three hundred twenty-two thousand, one hundred forty".