247297212 has 72 divisors (see below), whose sum is σ = 651014000. Its totient is φ = 82196208.

The previous prime is 247297207. The next prime is 247297213. The reversal of 247297212 is 212792742.

It is a super-2 number, since 2×247297212² = 122311822125945888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247297213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 708414 + ... + 708762.

Almost surely, 2^247297212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247297212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325507000).

247297212 is an abundant number, since it is smaller than the sum of its proper divisors (403716788).

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

247297212 is an frugal number, since it uses more digits than its factorization.

247297212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 354 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 247297212 is about 15725.6863761173. The cubic root of 247297212 is about 627.6820946319.

The spelling of 247297212 in words is "two hundred forty-seven million, two hundred ninety-seven thousand, two hundred twelve".