400401443133231 has 64 divisors (see below), whose sum is σ = 583635975782400. Its totient is φ = 243382101266304.

The previous prime is 400401443133227. The next prime is 400401443133311. The reversal of 400401443133231 is 132331344104004.

It is not a de Polignac number, because 400401443133231 - 2² = 400401443133227 is a prime.

It is a super-2 number, since 2×400401443133231² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400401443133192 and 400401443133201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400401443173231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1903640236 + ... + 1903850558.

It is an arithmetic number, because the mean of its divisors is an integer number (9119312121600).

Almost surely, 2^{400401443133231} is an apocalyptic number.

400401443133231 is a deficient number, since it is larger than the sum of its proper divisors (183234532649169).

400401443133231 is a wasteful number, since it uses less digits than its factorization.

400401443133231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222500.

The product of its (nonzero) digits is 41472, while the sum is 33.

Adding to 400401443133231 its reverse (132331344104004), we get a palindrome (532732787237235).

The spelling of 400401443133231 in words is "four hundred trillion, four hundred one billion, four hundred forty-three million, one hundred thirty-three thousand, two hundred thirty-one".