405544043031 has 64 divisors (see below), whose sum is σ = 606777163776. Its totient is φ = 239612313600.

The previous prime is 405544043029. The next prime is 405544043057. The reversal of 405544043031 is 130340445504.

It is a happy number.

It is not a de Polignac number, because 405544043031 - 2¹ = 405544043029 is a prime.

It is a super-2 number, since 2×405544043031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 405544042983 and 405544043001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405544043431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21722841 + ... + 21741501.

It is an arithmetic number, because the mean of its divisors is an integer number (9480893184).

Almost surely, 2^405544043031 is an apocalyptic number.

405544043031 is a deficient number, since it is larger than the sum of its proper divisors (201233120745).

405544043031 is a wasteful number, since it uses less digits than its factorization.

405544043031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18992.

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

Adding to 405544043031 its reverse (130340445504), we get a palindrome (535884488535).

The spelling of 405544043031 in words is "four hundred five billion, five hundred forty-four million, forty-three thousand, thirty-one".