400304422221 has 32 divisors (see below), whose sum is σ = 590034291840. Its totient is φ = 239386272000.

The previous prime is 400304422159. The next prime is 400304422237. The reversal of 400304422221 is 122224403004.

It is not a de Polignac number, because 400304422221 - 2⁶ = 400304422157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400304422191 and 400304422200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400304422261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 771615 + ... + 1181523.

It is an arithmetic number, because the mean of its divisors is an integer number (18438571620).

Almost surely, 2^400304422221 is an apocalyptic number.

It is an amenable number.

400304422221 is a deficient number, since it is larger than the sum of its proper divisors (189729869619).

400304422221 is a wasteful number, since it uses less digits than its factorization.

400304422221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410317.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 400304422221 its reverse (122224403004), we get a palindrome (522528825225).

The spelling of 400304422221 in words is "four hundred billion, three hundred four million, four hundred twenty-two thousand, two hundred twenty-one".