478081531 has 4 divisors (see below), whose sum is σ = 506203992. Its totient is φ = 449959072.

The previous prime is 478081529. The next prime is 478081537. The reversal of 478081531 is 135180874.

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

It is a cyclic number.

It is not a de Polignac number, because 478081531 - 2¹ = 478081529 is a prime.

It is a super-2 number, since 2×478081531² = 457123900566607922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478081537) 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, 14061205 + ... + 14061238.

It is an arithmetic number, because the mean of its divisors is an integer number (126550998).

Almost surely, 2^478081531 is an apocalyptic number.

478081531 is a deficient number, since it is larger than the sum of its proper divisors (28122461).

478081531 is a wasteful number, since it uses less digits than its factorization.

478081531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28122460.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 478081531 is about 21865.0756001437. The cubic root of 478081531 is about 781.9290031545.

The spelling of 478081531 in words is "four hundred seventy-eight million, eighty-one thousand, five hundred thirty-one".