475512221 has 8 divisors (see below), whose sum is σ = 502538400. Its totient is φ = 448686000.

The previous prime is 475512209. The next prime is 475512251. The reversal of 475512221 is 122215574.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-475512221 is a prime.

It is a super-2 number, since 2×475512221² = 452223744640705682, which contains 22 as substring.

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 (475512251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45086 + ... + 54623.

It is an arithmetic number, because the mean of its divisors is an integer number (62817300).

Almost surely, 2^475512221 is an apocalyptic number.

It is an amenable number.

475512221 is a deficient number, since it is larger than the sum of its proper divisors (27026179).

475512221 is a wasteful number, since it uses less digits than its factorization.

475512221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99979.

The product of its digits is 5600, while the sum is 29.

The square root of 475512221 is about 21806.2427070782. The cubic root of 475512221 is about 780.5257364024.

Adding to 475512221 its reverse (122215574), we get a palindrome (597727795).

The spelling of 475512221 in words is "four hundred seventy-five million, five hundred twelve thousand, two hundred twenty-one".