213403224 has 32 divisors (see below), whose sum is σ = 535242240. Its totient is φ = 70903200.

The previous prime is 213403217. The next prime is 213403243. The reversal of 213403224 is 422304312.

It is a self number, because there is not a number n which added to its sum of digits gives 213403224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6832 + ... + 21759.

It is an arithmetic number, because the mean of its divisors is an integer number (16726320).

Almost surely, 2^213403224 is an apocalyptic number.

213403224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

213403224 is an abundant number, since it is smaller than the sum of its proper divisors (321839016).

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

213403224 is a wasteful number, since it uses less digits than its factorization.

213403224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28911 (or 28907 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 213403224 is about 14608.3272142980. The cubic root of 213403224 is about 597.5858774926.

Adding to 213403224 its reverse (422304312), we get a palindrome (635707536).

The spelling of 213403224 in words is "two hundred thirteen million, four hundred three thousand, two hundred twenty-four".