400043221432 has 16 divisors (see below), whose sum is σ = 750098096640. Its totient is φ = 200017062336.

The previous prime is 400043221421. The next prime is 400043221439. The reversal of 400043221432 is 234122340004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 400043221397 and 400043221406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400043221439) 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 3 ways as a sum of consecutive naturals, for example, 179053 + ... + 912220.

It is an arithmetic number, because the mean of its divisors is an integer number (46881131040).

Almost surely, 2^400043221432 is an apocalyptic number.

It is an amenable number.

400043221432 is a deficient number, since it is larger than the sum of its proper divisors (350054875208).

400043221432 is a wasteful number, since it uses less digits than its factorization.

400043221432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137102 (or 1137098 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 400043221432 its reverse (234122340004), we get a palindrome (634165561436).

The spelling of 400043221432 in words is "four hundred billion, forty-three million, two hundred twenty-one thousand, four hundred thirty-two".