247055821205 has 8 divisors (see below), whose sum is σ = 313906219992. Its totient is φ = 186018500608.

The previous prime is 247055821147. The next prime is 247055821223. The reversal of 247055821205 is 502128550742.

247055821205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 63466709476 + 183589111729 = 251926^2 + 428473^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247055821205 is a prime.

It is a super-2 number, since 2×247055821205² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1453269452 + ... + 1453269621.

It is an arithmetic number, because the mean of its divisors is an integer number (39238277499).

Almost surely, 2^247055821205 is an apocalyptic number.

It is an amenable number.

247055821205 is a deficient number, since it is larger than the sum of its proper divisors (66850398787).

247055821205 is a wasteful number, since it uses less digits than its factorization.

247055821205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906539095.

The product of its (nonzero) digits is 224000, while the sum is 41.

The spelling of 247055821205 in words is "two hundred forty-seven billion, fifty-five million, eight hundred twenty-one thousand, two hundred five".