405534534431 has 4 divisors (see below), whose sum is σ = 436729498632. Its totient is φ = 374339570232.

The previous prime is 405534534407. The next prime is 405534534443. The reversal of 405534534431 is 134435435504.

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 405534534431 - 2²⁶ = 405467425567 is a prime.

It is a super-2 number, since 2×405534534431² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405534534401) 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, 15597482081 + ... + 15597482106.

It is an arithmetic number, because the mean of its divisors is an integer number (109182374658).

Almost surely, 2^405534534431 is an apocalyptic number.

405534534431 is a deficient number, since it is larger than the sum of its proper divisors (31194964201).

405534534431 is a wasteful number, since it uses less digits than its factorization.

405534534431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31194964200.

The product of its (nonzero) digits is 864000, while the sum is 41.

Adding to 405534534431 its reverse (134435435504), we get a palindrome (539969969935).

The spelling of 405534534431 in words is "four hundred five billion, five hundred thirty-four million, five hundred thirty-four thousand, four hundred thirty-one".