400011231424431 has 16 divisors (see below), whose sum is σ = 612457387827840. Its totient is φ = 229671520434720.

The previous prime is 400011231424423. The next prime is 400011231424447. The reversal of 400011231424431 is 134424132110004.

It is a happy number.

It is not a de Polignac number, because 400011231424431 - 2³ = 400011231424423 is a prime.

It is a super-2 number, since 2×400011231424431² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400011231424471) 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, 318988222200 + ... + 318988223453.

It is an arithmetic number, because the mean of its divisors is an integer number (38278586739240).

Almost surely, 2^{400011231424431} is an apocalyptic number.

400011231424431 is a deficient number, since it is larger than the sum of its proper divisors (212446156403409).

400011231424431 is a wasteful number, since it uses less digits than its factorization.

400011231424431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637976445686.

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 400011231424431 its reverse (134424132110004), we get a palindrome (534435363534435).

The spelling of 400011231424431 in words is "four hundred trillion, eleven billion, two hundred thirty-one million, four hundred twenty-four thousand, four hundred thirty-one".