201220404 has 48 divisors (see below), whose sum is σ = 585371136. Its totient is φ = 52264800.

The previous prime is 201220391. The next prime is 201220423. The reversal of 201220404 is 404022102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107962 + ... + 109809.

It is an arithmetic number, because the mean of its divisors is an integer number (12195232).

Almost surely, 2^201220404 is an apocalyptic number.

It is an amenable number.

201220404 is an abundant number, since it is smaller than the sum of its proper divisors (384150732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201220404 is a wasteful number, since it uses less digits than its factorization.

201220404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217796 (or 217794 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 201220404 is about 14185.2177988214. The cubic root of 201220404 is about 585.9906306865.

Adding to 201220404 its reverse (404022102), we get a palindrome (605242506).

The spelling of 201220404 in words is "two hundred one million, two hundred twenty thousand, four hundred four".