478352581 has 4 divisors (see below), whose sum is σ = 546688672. Its totient is φ = 410016492.

The previous prime is 478352573. The next prime is 478352591. The reversal of 478352581 is 185253874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 478352581 - 2³ = 478352573 is a prime.

It is a super-2 number, since 2×478352581² = 457642383498723122, 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 (478352561) 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, 34168035 + ... + 34168048.

It is an arithmetic number, because the mean of its divisors is an integer number (136672168).

Almost surely, 2^478352581 is an apocalyptic number.

It is an amenable number.

478352581 is a deficient number, since it is larger than the sum of its proper divisors (68336091).

478352581 is an equidigital number, since it uses as much as digits as its factorization.

478352581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68336090.

The product of its digits is 268800, while the sum is 43.

The square root of 478352581 is about 21871.2729624958. The cubic root of 478352581 is about 782.0767476998.

The spelling of 478352581 in words is "four hundred seventy-eight million, three hundred fifty-two thousand, five hundred eighty-one".