247216812 has 12 divisors (see below), whose sum is σ = 576839256. Its totient is φ = 82405600.

The previous prime is 247216807. The next prime is 247216829. The reversal of 247216812 is 218612742.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×247216812² = 122232304270886688, which contains 22 as substring.

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, 10300689 + ... + 10300712.

It is an arithmetic number, because the mean of its divisors is an integer number (48069938).

Almost surely, 2^247216812 is an apocalyptic number.

It is an amenable number.

247216812 is an abundant number, since it is smaller than the sum of its proper divisors (329622444).

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

247216812 is a wasteful number, since it uses less digits than its factorization.

247216812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20601408 (or 20601406 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 247216812 is about 15723.1298410972. The cubic root of 247216812 is about 627.6140643320.

The spelling of 247216812 in words is "two hundred forty-seven million, two hundred sixteen thousand, eight hundred twelve".