405520434031 has 4 divisors (see below), whose sum is σ = 405547151032. Its totient is φ = 405493717032.

The previous prime is 405520434001. The next prime is 405520434089. The reversal of 405520434031 is 130434025504.

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 405520434031 - 2¹¹ = 405520431983 is a prime.

It is a super-2 number, since 2×405520434031² (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 = 405520433984 and 405520434002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405520434001) 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, 13335720 + ... + 13366093.

It is an arithmetic number, because the mean of its divisors is an integer number (101386787758).

Almost surely, 2^405520434031 is an apocalyptic number.

405520434031 is a deficient number, since it is larger than the sum of its proper divisors (26717001).

405520434031 is a wasteful number, since it uses less digits than its factorization.

405520434031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26717000.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 405520434031 its reverse (130434025504), we get a palindrome (535954459535).

The spelling of 405520434031 in words is "four hundred five billion, five hundred twenty million, four hundred thirty-four thousand, thirty-one".