400304221 has 8 divisors (see below), whose sum is σ = 413196800. Its totient is φ = 387520848.

The previous prime is 400304189. The next prime is 400304237. The reversal of 400304221 is 122403004.

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

It is a cyclic number.

It is not a de Polignac number, because 400304221 - 2⁵ = 400304189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400304195 and 400304204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400301221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19821 + ... + 34546.

It is an arithmetic number, because the mean of its divisors is an integer number (51649600).

Almost surely, 2^400304221 is an apocalyptic number.

It is an amenable number.

400304221 is a deficient number, since it is larger than the sum of its proper divisors (12892579).

400304221 is a wasteful number, since it uses less digits than its factorization.

400304221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54603.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 400304221 is about 20007.6040794494. The cubic root of 400304221 is about 736.9930456838.

Adding to 400304221 its reverse (122403004), we get a palindrome (522707225).

The spelling of 400304221 in words is "four hundred million, three hundred four thousand, two hundred twenty-one".