213102232209 has 24 divisors (see below), whose sum is σ = 322567189920. Its totient is φ = 139045389192.

The previous prime is 213102232171. The next prime is 213102232241. The reversal of 213102232209 is 902232201312.

213102232209 is a `hidden beast` number, since 2 + 1 + 310 + 22 + 322 + 0 + 9 = 666.

It is not a de Polignac number, because 213102232209 - 2¹⁹ = 213101707921 is a prime.

It is a super-2 number, since 2×213102232209² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213102232279) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1726839 + ... + 1846124.

It is an arithmetic number, because the mean of its divisors is an integer number (13440299580).

Almost surely, 2^213102232209 is an apocalyptic number.

It is an amenable number.

213102232209 is a deficient number, since it is larger than the sum of its proper divisors (109464957711).

213102232209 is an equidigital number, since it uses as much as digits as its factorization.

213102232209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3573066 (or 3573013 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The spelling of 213102232209 in words is "two hundred thirteen billion, one hundred two million, two hundred thirty-two thousand, two hundred nine".