213223400 has 48 divisors (see below), whose sum is σ = 533885100. Its totient is φ = 78727680.

The previous prime is 213223357. The next prime is 213223403. The reversal of 213223400 is 4322312.

It can be written as a sum of positive squares in 6 ways, for example, as 97574884 + 115648516 = 9878^2 + 10754^2 .

It is not an unprimeable number, because it can be changed into a prime (213223403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38405 + ... + 43604.

Almost surely, 2^213223400 is an apocalyptic number.

213223400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213223400 is an abundant number, since it is smaller than the sum of its proper divisors (320661700).

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

213223400 is a wasteful number, since it uses less digits than its factorization.

213223400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82038 (or 82029 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 213223400 is about 14602.1710714537. The cubic root of 213223400 is about 597.4179786222.

Adding to 213223400 its reverse (4322312), we get a palindrome (217545712).

The spelling of 213223400 in words is "two hundred thirteen million, two hundred twenty-three thousand, four hundred".