247855447 has 8 divisors (see below), whose sum is σ = 292401152. Its totient is φ = 205594200.

The previous prime is 247855441. The next prime is 247855457. The reversal of 247855447 is 744558742.

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

It is not a de Polignac number, because 247855447 - 2⁷ = 247855319 is a prime.

It is a super-2 number, since 2×247855447² = 122864645215139618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 247855397 and 247855406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247855441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570879 + ... + 571312.

It is an arithmetic number, because the mean of its divisors is an integer number (36550144).

Almost surely, 2^247855447 is an apocalyptic number.

247855447 is a deficient number, since it is larger than the sum of its proper divisors (44545705).

247855447 is a wasteful number, since it uses less digits than its factorization.

247855447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142229.

The product of its digits is 1254400, while the sum is 46.

The square root of 247855447 is about 15743.4255167038. The cubic root of 247855447 is about 628.1540379371.

The spelling of 247855447 in words is "two hundred forty-seven million, eight hundred fifty-five thousand, four hundred forty-seven".