213213431420 has 24 divisors (see below), whose sum is σ = 488452588848. Its totient is φ = 77532156800.

The previous prime is 213213431419. The next prime is 213213431441. The reversal of 213213431420 is 24134312312.

213213431420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 213213431420.

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 7 ways as a sum of consecutive naturals, for example, 484575761 + ... + 484576200.

It is an arithmetic number, because the mean of its divisors is an integer number (20352191202).

Almost surely, 2^213213431420 is an apocalyptic number.

213213431420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213213431420 is an abundant number, since it is smaller than the sum of its proper divisors (275239157428).

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

213213431420 is a wasteful number, since it uses less digits than its factorization.

213213431420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969151981 (or 969151979 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 213213431420 its reverse (24134312312), we get a palindrome (237347743732).

The spelling of 213213431420 in words is "two hundred thirteen billion, two hundred thirteen million, four hundred thirty-one thousand, four hundred twenty".