1216226206 has 32 divisors (see below), whose sum is σ = 2082816288. Its totient is φ = 527662080.

The previous prime is 1216226201. The next prime is 1216226227. The reversal of 1216226206 is 6026226121.

It is a super-2 number, since 2×1216226206² = 2958412368322308872, which contains 22 as substring.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 582841 + ... + 584923.

It is an arithmetic number, because the mean of its divisors is an integer number (65088009).

Almost surely, 2^1216226206 is an apocalyptic number.

1216226206 is a deficient number, since it is larger than the sum of its proper divisors (866590082).

1216226206 is a wasteful number, since it uses less digits than its factorization.

1216226206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3436.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 1216226206 is about 34874.4348484674. The cubic root of 1216226206 is about 1067.4268405237.

The spelling of 1216226206 in words is "one billion, two hundred sixteen million, two hundred twenty-six thousand, two hundred six".