478172551 has 8 divisors (see below), whose sum is σ = 494912000. Its totient is φ = 461515320.

The previous prime is 478172509. The next prime is 478172573. The reversal of 478172551 is 155271874.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 478172551 - 2¹¹ = 478170503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478172251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8601 + ... + 32098.

It is an arithmetic number, because the mean of its divisors is an integer number (61864000).

Almost surely, 2^478172551 is an apocalyptic number.

478172551 is a deficient number, since it is larger than the sum of its proper divisors (16739449).

478172551 is a wasteful number, since it uses less digits than its factorization.

478172551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41109.

The product of its digits is 78400, while the sum is 40.

The square root of 478172551 is about 21867.1569025331. The cubic root of 478172551 is about 781.9786227676.

The spelling of 478172551 in words is "four hundred seventy-eight million, one hundred seventy-two thousand, five hundred fifty-one".