213304136 has 8 divisors (see below), whose sum is σ = 399945270. Its totient is φ = 106652064.

The previous prime is 213304121. The next prime is 213304141. The reversal of 213304136 is 631403312.

It can be written as a sum of positive squares in only one way, i.e., 146555236 + 66748900 = 12106^2 + 8170^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 13331501 + ... + 13331516.

Almost surely, 2^213304136 is an apocalyptic number.

It is an amenable number.

213304136 is a deficient number, since it is larger than the sum of its proper divisors (186641134).

213304136 is a wasteful number, since it uses less digits than its factorization.

213304136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26663023 (or 26663019 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 213304136 is about 14604.9353302231. The cubic root of 213304136 is about 597.4933722414.

Adding to 213304136 its reverse (631403312), we get a palindrome (844707448).

The spelling of 213304136 in words is "two hundred thirteen million, three hundred four thousand, one hundred thirty-six".