247442271 has 4 divisors (see below), whose sum is σ = 329923032. Its totient is φ = 164961512.

The previous prime is 247442249. The next prime is 247442281. The reversal of 247442271 is 172244742.

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 247442271 - 2¹³ = 247434079 is a prime.

It is a super-2 number, since 2×247442271² = 122455354955274882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247442231) 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, 41240376 + ... + 41240381.

It is an arithmetic number, because the mean of its divisors is an integer number (82480758).

Almost surely, 2^247442271 is an apocalyptic number.

247442271 is a deficient number, since it is larger than the sum of its proper divisors (82480761).

247442271 is an equidigital number, since it uses as much as digits as its factorization.

247442271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82480760.

The product of its digits is 25088, while the sum is 33.

The square root of 247442271 is about 15730.2978674913. The cubic root of 247442271 is about 627.8047987244.

The spelling of 247442271 in words is "two hundred forty-seven million, four hundred forty-two thousand, two hundred seventy-one".