505405131404 has 24 divisors (see below), whose sum is σ = 977202763488. Its totient is φ = 227496938240.

The previous prime is 505405131397. The next prime is 505405131409. The reversal of 505405131404 is 404131504505.

It is a super-2 number, since 2×505405131404² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (505405131409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161572967 + ... + 161576094.

It is an arithmetic number, because the mean of its divisors is an integer number (40716781812).

Almost surely, 2^505405131404 is an apocalyptic number.

It is an amenable number.

505405131404 is a deficient number, since it is larger than the sum of its proper divisors (471797632084).

505405131404 is a wasteful number, since it uses less digits than its factorization.

505405131404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323149105 (or 323149103 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 505405131404 its reverse (404131504505), we get a palindrome (909536635909).

The spelling of 505405131404 in words is "five hundred five billion, four hundred five million, one hundred thirty-one thousand, four hundred four".