1217229216 has 48 divisors (see below), whose sum is σ = 3651689664. Its totient is φ = 347779584.

The previous prime is 1217229203. The next prime is 1217229239. The reversal of 1217229216 is 6129227121.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 905005 + ... + 906348.

It is an arithmetic number, because the mean of its divisors is an integer number (76076868).

Almost surely, 2^1217229216 is an apocalyptic number.

1217229216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1217229216 is an abundant number, since it is smaller than the sum of its proper divisors (2434460448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1217229216 is a wasteful number, since it uses less digits than its factorization.

1217229216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811373 (or 1811365 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 1217229216 is about 34888.8121895831. The cubic root of 1217229216 is about 1067.7201920974.

The spelling of 1217229216 in words is "one billion, two hundred seventeen million, two hundred twenty-nine thousand, two hundred sixteen".