478277231 has 2 divisors, whose sum is σ = 478277232. Its totient is φ = 478277230.

The previous prime is 478277227. The next prime is 478277323. The reversal of 478277231 is 132772874.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 478277231 - 2² = 478277227 is a prime.

It is a super-3 number, since 3×478277231³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478271231) 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 as a sum of consecutive naturals, namely, 239138615 + 239138616.

It is an arithmetic number, because the mean of its divisors is an integer number (239138616).

Almost surely, 2^478277231 is an apocalyptic number.

478277231 is a deficient number, since it is larger than the sum of its proper divisors (1).

478277231 is an equidigital number, since it uses as much as digits as its factorization.

478277231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 131712, while the sum is 41.

The square root of 478277231 is about 21869.5503154500. The cubic root of 478277231 is about 782.0356813541.

The spelling of 478277231 in words is "four hundred seventy-eight million, two hundred seventy-seven thousand, two hundred thirty-one".