213236504 has 32 divisors (see below), whose sum is σ = 436487520. Its totient is φ = 97065216.

The previous prime is 213236503. The next prime is 213236521. The reversal of 213236504 is 405632312.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213236503) 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, 6452 + ... + 21635.

It is an arithmetic number, because the mean of its divisors is an integer number (13640235).

Almost surely, 2^213236504 is an apocalyptic number.

It is an amenable number.

213236504 is an abundant number, since it is smaller than the sum of its proper divisors (223251016).

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

213236504 is a wasteful number, since it uses less digits than its factorization.

213236504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28179 (or 28175 counting only the distinct ones).

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

The square root of 213236504 is about 14602.6197649600. The cubic root of 213236504 is about 597.4302168113.

Adding to 213236504 its reverse (405632312), we get a palindrome (618868816).

The spelling of 213236504 in words is "two hundred thirteen million, two hundred thirty-six thousand, five hundred four".