400433424321 has 16 divisors (see below), whose sum is σ = 646077458304. Its totient is φ = 215359152384.

The previous prime is 400433424289. The next prime is 400433424487. The reversal of 400433424321 is 123424334004.

It is a happy number.

It is not a de Polignac number, because 400433424321 - 2⁵ = 400433424289 is a prime.

It is a super-2 number, since 2×400433424321² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400433428321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560830770 + ... + 560831483.

It is an arithmetic number, because the mean of its divisors is an integer number (40379841144).

Almost surely, 2^400433424321 is an apocalyptic number.

It is an amenable number.

400433424321 is a deficient number, since it is larger than the sum of its proper divisors (245644033983).

400433424321 is a wasteful number, since it uses less digits than its factorization.

400433424321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121662280.

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 400433424321 its reverse (123424334004), we get a palindrome (523857758325).

The spelling of 400433424321 in words is "four hundred billion, four hundred thirty-three million, four hundred twenty-four thousand, three hundred twenty-one".