213403320 has 96 divisors (see below), whose sum is σ = 746928000. Its totient is φ = 52528896.

The previous prime is 213403303. The next prime is 213403321. The reversal of 213403320 is 23304312.

213403320 is a `hidden beast` number, since 2 + 1 + 340 + 3 + 320 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 213403293 and 213403302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213403321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18120 + ... + 27479.

It is an arithmetic number, because the mean of its divisors is an integer number (7780500).

Almost surely, 2^213403320 is an apocalyptic number.

213403320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213403320 is an abundant number, since it is smaller than the sum of its proper divisors (533524680).

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

213403320 is a wasteful number, since it uses less digits than its factorization.

213403320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45629 (or 45622 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 213403320 is about 14608.3305000948. The cubic root of 213403320 is about 597.5859671011.

Adding to 213403320 its reverse (23304312), we get a palindrome (236707632).

The spelling of 213403320 in words is "two hundred thirteen million, four hundred three thousand, three hundred twenty".