1223215065 has 24 divisors (see below), whose sum is σ = 2147084160. Its totient is φ = 644121504.

The previous prime is 1223215061. The next prime is 1223215067. The reversal of 1223215065 is 5605123221.

It is a happy number.

1223215065 is a `hidden beast` number, since 122 + 32 + 1 + 506 + 5 = 666.

1223215065 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1223215065 - 2² = 1223215061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1223215061) 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, 168487 + ... + 175596.

It is an arithmetic number, because the mean of its divisors is an integer number (89461840).

Almost surely, 2^1223215065 is an apocalyptic number.

1223215065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223215065 is a deficient number, since it is larger than the sum of its proper divisors (923869095).

1223215065 is a wasteful number, since it uses less digits than its factorization.

1223215065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344173 (or 344170 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1223215065 is about 34974.4916331889. The cubic root of 1223215065 is about 1069.4675386693.

Adding to 1223215065 its reverse (5605123221), we get a palindrome (6828338286).

The spelling of 1223215065 in words is "one billion, two hundred twenty-three million, two hundred fifteen thousand, sixty-five".