247910042243 has 4 divisors (see below), whose sum is σ = 247911179160. Its totient is φ = 247908905328.

The previous prime is 247910042189. The next prime is 247910042249. The reversal of 247910042243 is 342240019742.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 247910042243 - 2¹⁴ = 247910025859 is a prime.

It is a super-2 number, since 2×247910042243² (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 = 247910042197 and 247910042206.

It is not an unprimeable number, because it can be changed into a prime (247910042249) 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, 127205 + ... + 715542.

It is an arithmetic number, because the mean of its divisors is an integer number (61977794790).

Almost surely, 2^247910042243 is an apocalyptic number.

247910042243 is a deficient number, since it is larger than the sum of its proper divisors (1136917).

247910042243 is an equidigital number, since it uses as much as digits as its factorization.

247910042243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136916.

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 247910042243 in words is "two hundred forty-seven billion, nine hundred ten million, forty-two thousand, two hundred forty-three".