475555421 has 4 divisors (see below), whose sum is σ = 518787744. Its totient is φ = 432323100.

The previous prime is 475555417. The next prime is 475555459. The reversal of 475555421 is 124555574.

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 not a de Polignac number, because 475555421 - 2² = 475555417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (475555411) 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, 21616145 + ... + 21616166.

It is an arithmetic number, because the mean of its divisors is an integer number (129696936).

Almost surely, 2^475555421 is an apocalyptic number.

It is an amenable number.

475555421 is a deficient number, since it is larger than the sum of its proper divisors (43232323).

475555421 is a wasteful number, since it uses less digits than its factorization.

475555421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43232322.

The product of its digits is 140000, while the sum is 38.

The square root of 475555421 is about 21807.2332266154. The cubic root of 475555421 is about 780.5493724516.

The spelling of 475555421 in words is "four hundred seventy-five million, five hundred fifty-five thousand, four hundred twenty-one".