247085871 has 16 divisors (see below), whose sum is σ = 350612064. Its totient is φ = 154241024.

The previous prime is 247085863. The next prime is 247085921. The reversal of 247085871 is 178580742.

It is a cyclic number.

It is not a de Polignac number, because 247085871 - 2³ = 247085863 is a prime.

It is a super-2 number, since 2×247085871² = 122102855295657282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247085831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2250 + ... + 22343.

It is an arithmetic number, because the mean of its divisors is an integer number (21913254).

Almost surely, 2^247085871 is an apocalyptic number.

247085871 is a deficient number, since it is larger than the sum of its proper divisors (103526193).

247085871 is a wasteful number, since it uses less digits than its factorization.

247085871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24810.

The product of its (nonzero) digits is 125440, while the sum is 42.

The square root of 247085871 is about 15718.9653285450. The cubic root of 247085871 is about 627.5032372864.

The spelling of 247085871 in words is "two hundred forty-seven million, eighty-five thousand, eight hundred seventy-one".