1223517216 has 48 divisors (see below), whose sum is σ = 3213756000. Its totient is φ = 407582208.

The previous prime is 1223517209. The next prime is 1223517233. The reversal of 1223517216 is 6127153221.

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, 206260 + ... + 212108.

It is an arithmetic number, because the mean of its divisors is an integer number (66953250).

Almost surely, 2^1223517216 is an apocalyptic number.

1223517216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1223517216 is an abundant number, since it is smaller than the sum of its proper divisors (1990238784).

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

1223517216 is a wasteful number, since it uses less digits than its factorization.

1223517216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8041 (or 8033 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 1223517216 is about 34978.8109574925. The cubic root of 1223517216 is about 1069.5555891663. Note that the first 4 decimals are identical.

The spelling of 1223517216 in words is "one billion, two hundred twenty-three million, five hundred seventeen thousand, two hundred sixteen".