478535531 has 4 divisors (see below), whose sum is σ = 478637472. Its totient is φ = 478433592.

The previous prime is 478535509. The next prime is 478535573. The reversal of 478535531 is 135535874.

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 478535531 - 2¹⁴ = 478519147 is a prime.

It is a super-2 number, since 2×478535531² = 457992508858903922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478535581) 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, 43571 + ... + 53436.

It is an arithmetic number, because the mean of its divisors is an integer number (119659368).

Almost surely, 2^478535531 is an apocalyptic number.

478535531 is a deficient number, since it is larger than the sum of its proper divisors (101941).

478535531 is an equidigital number, since it uses as much as digits as its factorization.

478535531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101940.

The product of its digits is 252000, while the sum is 41.

The square root of 478535531 is about 21875.4549895539. The cubic root of 478535531 is about 782.1764389525.

The spelling of 478535531 in words is "four hundred seventy-eight million, five hundred thirty-five thousand, five hundred thirty-one".