400432310431 has 4 divisors (see below), whose sum is σ = 402150904272. Its totient is φ = 398713716592.

The previous prime is 400432310429. The next prime is 400432310461. The reversal of 400432310431 is 134013234004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400432310431 - 2¹ = 400432310429 is a prime.

It is a super-2 number, since 2×400432310431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400432310396 and 400432310405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400432310401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 859296571 + ... + 859297036.

It is an arithmetic number, because the mean of its divisors is an integer number (100537726068).

Almost surely, 2^400432310431 is an apocalyptic number.

400432310431 is a deficient number, since it is larger than the sum of its proper divisors (1718593841).

400432310431 is a wasteful number, since it uses less digits than its factorization.

400432310431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718593840.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 400432310431 its reverse (134013234004), we get a palindrome (534445544435).

The spelling of 400432310431 in words is "four hundred billion, four hundred thirty-two million, three hundred ten thousand, four hundred thirty-one".