213638224 has 10 divisors (see below), whose sum is σ = 413924090. Its totient is φ = 106819104.

The previous prime is 213638213. The next prime is 213638231. The reversal of 213638224 is 422836312.

It can be written as a sum of positive squares in only one way, i.e., 110250000 + 103388224 = 10500^2 + 10168^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6676179 + ... + 6676210.

It is an arithmetic number, because the mean of its divisors is an integer number (41392409).

Almost surely, 2^213638224 is an apocalyptic number.

It is an amenable number.

213638224 is a deficient number, since it is larger than the sum of its proper divisors (200285866).

213638224 is a wasteful number, since it uses less digits than its factorization.

213638224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13352397 (or 13352391 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 213638224 is about 14616.3683587956. The cubic root of 213638224 is about 597.8051512253.

The spelling of 213638224 in words is "two hundred thirteen million, six hundred thirty-eight thousand, two hundred twenty-four".