1216226207 has 16 divisors (see below), whose sum is σ = 1434312000. Its totient is φ = 1030740480.

The previous prime is 1216226201. The next prime is 1216226227. The reversal of 1216226207 is 7026226121.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1216226207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1216226207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216226201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10607 + ... + 50447.

It is an arithmetic number, because the mean of its divisors is an integer number (89644500).

Almost surely, 2^1216226207 is an apocalyptic number.

1216226207 is a deficient number, since it is larger than the sum of its proper divisors (218085793).

1216226207 is an frugal number, since it uses more digits than its factorization.

1216226207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39951 (or 39937 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 1216226207 is about 34874.4348628046. The cubic root of 1216226207 is about 1067.4268408163.

The spelling of 1216226207 in words is "one billion, two hundred sixteen million, two hundred twenty-six thousand, two hundred seven".