478847231 has 4 divisors (see below), whose sum is σ = 480994752. Its totient is φ = 476699712.

The previous prime is 478847221. The next prime is 478847261. The reversal of 478847231 is 132748874.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478847231 is a prime.

It is a super-2 number, since 2×478847231² = 458589341272734722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478847221) 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, 1073426 + ... + 1073871.

It is an arithmetic number, because the mean of its divisors is an integer number (120248688).

Almost surely, 2^478847231 is an apocalyptic number.

478847231 is a deficient number, since it is larger than the sum of its proper divisors (2147521).

478847231 is a wasteful number, since it uses less digits than its factorization.

478847231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2147520.

The product of its digits is 301056, while the sum is 44.

The square root of 478847231 is about 21882.5782530304. The cubic root of 478847231 is about 782.3462288387.

The spelling of 478847231 in words is "four hundred seventy-eight million, eight hundred forty-seven thousand, two hundred thirty-one".