400544534031 has 4 divisors (see below), whose sum is σ = 534059378712. Its totient is φ = 267029689352.

The previous prime is 400544534023. The next prime is 400544534059. The reversal of 400544534031 is 130435445004.

It is a happy number.

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 400544534031 - 2³ = 400544534023 is a prime.

It is a super-2 number, since 2×400544534031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400544533983 and 400544534001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400544534011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66757422336 + ... + 66757422341.

It is an arithmetic number, because the mean of its divisors is an integer number (133514844678).

Almost surely, 2^400544534031 is an apocalyptic number.

400544534031 is a deficient number, since it is larger than the sum of its proper divisors (133514844681).

400544534031 is a wasteful number, since it uses less digits than its factorization.

400544534031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133514844680.

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 400544534031 its reverse (130435445004), we get a palindrome (530979979035).

The spelling of 400544534031 in words is "four hundred billion, five hundred forty-four million, five hundred thirty-four thousand, thirty-one".