213406222065 has 32 divisors (see below), whose sum is σ = 349695849216. Its totient is φ = 111100170240.

The previous prime is 213406222063. The next prime is 213406222079. The reversal of 213406222065 is 560222604312.

It is a happy number.

It is not a de Polignac number, because 213406222065 - 2¹ = 213406222063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213406222061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 898381 + ... + 1110810.

It is an arithmetic number, because the mean of its divisors is an integer number (10927995288).

Almost surely, 2^213406222065 is an apocalyptic number.

It is an amenable number.

213406222065 is a deficient number, since it is larger than the sum of its proper divisors (136289627151).

213406222065 is a wasteful number, since it uses less digits than its factorization.

213406222065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2009369.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 213406222065 its reverse (560222604312), we get a palindrome (773628826377).

The spelling of 213406222065 in words is "two hundred thirteen billion, four hundred six million, two hundred twenty-two thousand, sixty-five".