247224836 has 12 divisors (see below), whose sum is σ = 432792528. Its totient is φ = 123569832.

The previous prime is 247224821. The next prime is 247224839. The reversal of 247224836 is 638422742.

It is a super-2 number, since 2×247224836² = 122240239070453792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247224836.

It is not an unprimeable number, because it can be changed into a prime (247224839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4955 + ... + 22781.

It is an arithmetic number, because the mean of its divisors is an integer number (36066044).

Almost surely, 2^247224836 is an apocalyptic number.

It is an amenable number.

247224836 is a deficient number, since it is larger than the sum of its proper divisors (185567692).

247224836 is a wasteful number, since it uses less digits than its factorization.

247224836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21298 (or 21296 counting only the distinct ones).

The product of its digits is 129024, while the sum is 38.

The square root of 247224836 is about 15723.3850045084. The cubic root of 247224836 is about 627.6208544862.

The spelling of 247224836 in words is "two hundred forty-seven million, two hundred twenty-four thousand, eight hundred thirty-six".