478172513 has 16 divisors (see below), whose sum is σ = 602211456. Its totient is φ = 369532800.

The previous prime is 478172509. The next prime is 478172573. The reversal of 478172513 is 315271874.

It is not a de Polignac number, because 478172513 - 2² = 478172509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (478172573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57188 + ... + 65013.

It is an arithmetic number, because the mean of its divisors is an integer number (37638216).

Almost surely, 2^478172513 is an apocalyptic number.

478172513 is a gapful number since it is divisible by the number (43) formed by its first and last digit.

It is an amenable number.

478172513 is a deficient number, since it is larger than the sum of its proper divisors (124038943).

478172513 is a wasteful number, since it uses less digits than its factorization.

478172513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122264.

The product of its digits is 47040, while the sum is 38.

The square root of 478172513 is about 21867.1560336501. The cubic root of 478172513 is about 781.9786020531.

The spelling of 478172513 in words is "four hundred seventy-eight million, one hundred seventy-two thousand, five hundred thirteen".