247478255 has 8 divisors (see below), whose sum is σ = 304217424. Its totient is φ = 193153600.

The previous prime is 247478251. The next prime is 247478263. The reversal of 247478255 is 552874742.

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

It is not a de Polignac number, because 247478255 - 2² = 247478251 is a prime.

It is a super-2 number, since 2×247478255² = 122490973395690050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247478251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603401 + ... + 603810.

It is an arithmetic number, because the mean of its divisors is an integer number (38027178).

Almost surely, 2^247478255 is an apocalyptic number.

247478255 is a deficient number, since it is larger than the sum of its proper divisors (56739169).

247478255 is a wasteful number, since it uses less digits than its factorization.

247478255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207257.

The product of its digits is 627200, while the sum is 44.

The square root of 247478255 is about 15731.4416059050. The cubic root of 247478255 is about 627.8352298398.

The spelling of 247478255 in words is "two hundred forty-seven million, four hundred seventy-eight thousand, two hundred fifty-five".