475221 has 4 divisors (see below), whose sum is σ = 633632. Its totient is φ = 316812.

The previous prime is 475219. The next prime is 475229. The reversal of 475221 is 122574.

475221 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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 475221 - 2¹ = 475219 is a prime.

It is a D-number.

It is a Duffinian number.

475221 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (475229) 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, 79201 + ... + 79206.

It is an arithmetic number, because the mean of its divisors is an integer number (158408).

2⁴⁷⁵²²¹ is an apocalyptic number.

It is an amenable number.

475221 is a deficient number, since it is larger than the sum of its proper divisors (158411).

475221 is a wasteful number, since it uses less digits than its factorization.

475221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158410.

The product of its digits is 560, while the sum is 21.

The square root of 475221 is about 689.3627492112. The cubic root of 475221 is about 78.0366363068.

Adding to 475221 its reverse (122574), we get a palindrome (597795).

It can be divided in two parts, 475 and 221, that added together give a palindrome (696).

The spelling of 475221 in words is "four hundred seventy-five thousand, two hundred twenty-one".