213504236 has 24 divisors (see below), whose sum is σ = 412186320. Its totient is φ = 95955200.

The previous prime is 213504233. The next prime is 213504251. The reversal of 213504236 is 632405312.

It is not an unprimeable number, because it can be changed into a prime (213504233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23345 + ... + 31176.

It is an arithmetic number, because the mean of its divisors is an integer number (17174430).

Almost surely, 2^213504236 is an apocalyptic number.

It is an amenable number.

213504236 is a deficient number, since it is larger than the sum of its proper divisors (198682084).

213504236 is a wasteful number, since it uses less digits than its factorization.

213504236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54625 (or 54623 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 213504236 is about 14611.7841484194. The cubic root of 213504236 is about 597.6801494565.

Adding to 213504236 its reverse (632405312), we get a palindrome (845909548).

The spelling of 213504236 in words is "two hundred thirteen million, five hundred four thousand, two hundred thirty-six".