475420213 has 4 divisors (see below), whose sum is σ = 475467628. Its totient is φ = 475372800.

The previous prime is 475420199. The next prime is 475420217. The reversal of 475420213 is 312024574.

It is the 8902-nd star number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 333500644 + 141919569 = 18262^2 + 11913^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-475420213 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 (475420217) 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, 2106 + ... + 30907.

It is an arithmetic number, because the mean of its divisors is an integer number (118866907).

Almost surely, 2^475420213 is an apocalyptic number.

It is an amenable number.

475420213 is a deficient number, since it is larger than the sum of its proper divisors (47415).

475420213 is a wasteful number, since it uses less digits than its factorization.

475420213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47414.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 475420213 is about 21804.1329339187. The cubic root of 475420213 is about 780.4753912229.

Adding to 475420213 its reverse (312024574), we get a palindrome (787444787).

The spelling of 475420213 in words is "four hundred seventy-five million, four hundred twenty thousand, two hundred thirteen".