213523232 has 24 divisors (see below), whose sum is σ = 452711196. Its totient is φ = 98548992.

The previous prime is 213523231. The next prime is 213523243. The reversal of 213523232 is 232325312.

It can be written as a sum of positive squares in 2 ways, for example, as 210714256 + 2808976 = 14516^2 + 1676^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213523198 and 213523207.

It is not an unprimeable number, because it can be changed into a prime (213523231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256223 + ... + 257054.

Almost surely, 2^213523232 is an apocalyptic number.

It is an amenable number.

213523232 is an abundant number, since it is smaller than the sum of its proper divisors (239187964).

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

213523232 is a wasteful number, since it uses less digits than its factorization.

213523232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513300 (or 513292 counting only the distinct ones).

The product of its digits is 2160, while the sum is 23.

The square root of 213523232 is about 14612.4341572511. The cubic root of 213523232 is about 597.6978746246.

Adding to 213523232 its reverse (232325312), we get a palindrome (445848544).

It can be divided in two parts, 21 and 3523232, that added together give a palindrome (3523253).

The spelling of 213523232 in words is "two hundred thirteen million, five hundred twenty-three thousand, two hundred thirty-two".