247213236 has 48 divisors (see below), whose sum is σ = 588365120. Its totient is φ = 80766720.

The previous prime is 247213207. The next prime is 247213283. The reversal of 247213236 is 632312742.

247213236 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247213236² = 122228768107183392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 334155 + ... + 334893.

Almost surely, 2^247213236 is an apocalyptic number.

It is an amenable number.

247213236 is an abundant number, since it is smaller than the sum of its proper divisors (341151884).

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

247213236 is a wasteful number, since it uses less digits than its factorization.

247213236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1264 (or 1262 counting only the distinct ones).

The product of its digits is 12096, while the sum is 30.

The square root of 247213236 is about 15723.0161228690. The cubic root of 247213236 is about 627.6110381642.

Adding to 247213236 its reverse (632312742), we get a palindrome (879525978).

The spelling of 247213236 in words is "two hundred forty-seven million, two hundred thirteen thousand, two hundred thirty-six".