213224238 has 24 divisors (see below), whose sum is σ = 479097528. Its totient is φ = 71074584.

The previous prime is 213224201. The next prime is 213224243. The reversal of 213224238 is 832422312.

213224238 is a `hidden beast` number, since 213 + 22 + 423 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 218881 + ... + 219852.

It is an arithmetic number, because the mean of its divisors is an integer number (19962397).

Almost surely, 2^213224238 is an apocalyptic number.

213224238 is an abundant number, since it is smaller than the sum of its proper divisors (265873290).

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

213224238 is an equidigital number, since it uses as much as digits as its factorization.

213224238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438750 (or 438738 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 213224238 is about 14602.1997657887. The cubic root of 213224238 is about 597.4187612687.

The spelling of 213224238 in words is "two hundred thirteen million, two hundred twenty-four thousand, two hundred thirty-eight".