247213512 has 128 divisors (see below), whose sum is σ = 845241600. Its totient is φ = 65193984.

The previous prime is 247213511. The next prime is 247213513. The reversal of 247213512 is 215312742.

It is an interprime number because it is at equal distance from previous prime (247213511) and next prime (247213513).

It is a super-2 number, since 2×247213512² = 122229041030748288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (247213511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13368 + ... + 25944.

It is an arithmetic number, because the mean of its divisors is an integer number (6603450).

Almost surely, 2^247213512 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 247213512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422620800).

247213512 is an abundant number, since it is smaller than the sum of its proper divisors (598028088).

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

247213512 is a wasteful number, since it uses less digits than its factorization.

247213512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12612 (or 12602 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 247213512 is about 15723.0248998086. The cubic root of 247213512 is about 627.6112717285.

The spelling of 247213512 in words is "two hundred forty-seven million, two hundred thirteen thousand, five hundred twelve".