404130031 has 4 divisors (see below), whose sum is σ = 404174032. Its totient is φ = 404086032.

The previous prime is 404130029. The next prime is 404130047. The reversal of 404130031 is 130031404.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 404130031 - 2¹ = 404130029 is a prime.

It is a super-2 number, since 2×404130031² = 326642163912121922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404129987 and 404130014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404130011) 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, 2406 + ... + 28531.

It is an arithmetic number, because the mean of its divisors is an integer number (101043508).

Almost surely, 2^404130031 is an apocalyptic number.

404130031 is a deficient number, since it is larger than the sum of its proper divisors (44001).

404130031 is a wasteful number, since it uses less digits than its factorization.

404130031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44000.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 404130031 is about 20102.9856240311. The cubic root of 404130031 is about 739.3334825121. Note that the first 3 decimals are identical.

Adding to 404130031 its reverse (130031404), we get a palindrome (534161435).

The spelling of 404130031 in words is "four hundred four million, one hundred thirty thousand, thirty-one".