213521632 has 24 divisors (see below), whose sum is σ = 445099536. Its totient is φ = 100480512.

The previous prime is 213521629. The next prime is 213521641. The reversal of 213521632 is 236125312.

It is a junction number, because it is equal to n+sod(n) for n = 213521597 and 213521606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195708 + ... + 196795.

It is an arithmetic number, because the mean of its divisors is an integer number (18545814).

Almost surely, 2^213521632 is an apocalyptic number.

It is an amenable number.

213521632 is an abundant number, since it is smaller than the sum of its proper divisors (231577904).

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

213521632 is a wasteful number, since it uses less digits than its factorization.

213521632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392530 (or 392522 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 213521632 is about 14612.3794092543. The cubic root of 213521632 is about 597.6963817051.

Adding to 213521632 its reverse (236125312), we get a palindrome (449646944).

The spelling of 213521632 in words is "two hundred thirteen million, five hundred twenty-one thousand, six hundred thirty-two".