247771472243 has 4 divisors (see below), whose sum is σ = 247788412320. Its totient is φ = 247754532168.

The previous prime is 247771472237. The next prime is 247771472287. The reversal of 247771472243 is 342274177742.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 247771472243 - 2¹⁰ = 247771471219 is a prime.

It is a super-2 number, since 2×247771472243² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 247771472191 and 247771472200.

It is not an unprimeable number, because it can be changed into a prime (247771474243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8448080 + ... + 8477357.

It is an arithmetic number, because the mean of its divisors is an integer number (61947103080).

Almost surely, 2^247771472243 is an apocalyptic number.

247771472243 is a deficient number, since it is larger than the sum of its proper divisors (16940077).

247771472243 is a wasteful number, since it uses less digits than its factorization.

247771472243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16940076.

The product of its digits is 3687936, while the sum is 50.

The spelling of 247771472243 in words is "two hundred forty-seven billion, seven hundred seventy-one million, four hundred seventy-two thousand, two hundred forty-three".