213523533220 has 24 divisors (see below), whose sum is σ = 448492439808. Its totient is φ = 85391695200.

The previous prime is 213523533199. The next prime is 213523533227. The reversal of 213523533220 is 22335325312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (213523533227) 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, 1008346 + ... + 1201585.

It is an arithmetic number, because the mean of its divisors is an integer number (18687184992).

Almost surely, 2^213523533220 is an apocalyptic number.

213523533220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213523533220 is an abundant number, since it is smaller than the sum of its proper divisors (234968906588).

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

213523533220 is a wasteful number, since it uses less digits than its factorization.

213523533220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214771 (or 2214769 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 31.

Adding to 213523533220 its reverse (22335325312), we get a palindrome (235858858532).

The spelling of 213523533220 in words is "two hundred thirteen billion, five hundred twenty-three million, five hundred thirty-three thousand, two hundred twenty".