1227188216 has 16 divisors (see below), whose sum is σ = 2303111040. Its totient is φ = 613025280.

The previous prime is 1227188203. The next prime is 1227188239. The reversal of 1227188216 is 6128817221.

It is a self number, because there is not a number n which added to its sum of digits gives 1227188216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61865 + ... + 79256.

It is an arithmetic number, because the mean of its divisors is an integer number (143944440).

Almost surely, 2^1227188216 is an apocalyptic number.

It is an amenable number.

1227188216 is a deficient number, since it is larger than the sum of its proper divisors (1075922824).

1227188216 is a wasteful number, since it uses less digits than its factorization.

1227188216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142214 (or 142210 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 1227188216 is about 35031.2462809989. The cubic root of 1227188216 is about 1070.6242073628.

The spelling of 1227188216 in words is "one billion, two hundred twenty-seven million, one hundred eighty-eight thousand, two hundred sixteen".