404631031 has 4 divisors (see below), whose sum is σ = 462435472. Its totient is φ = 346826592.

The previous prime is 404631013. The next prime is 404631041. The reversal of 404631031 is 130136404.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 404631031 - 2¹⁹ = 404106743 is a prime.

It is a super-2 number, since 2×404631031² = 327452542496245922, 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 = 404630993 and 404631011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404631041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28902210 + ... + 28902223.

It is an arithmetic number, because the mean of its divisors is an integer number (115608868).

Almost surely, 2^404631031 is an apocalyptic number.

404631031 is a deficient number, since it is larger than the sum of its proper divisors (57804441).

404631031 is an equidigital number, since it uses as much as digits as its factorization.

404631031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57804440.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 404631031 is about 20115.4426001518. The cubic root of 404631031 is about 739.6388735889.

Adding to 404631031 its reverse (130136404), we get a palindrome (534767435).

The spelling of 404631031 in words is "four hundred four million, six hundred thirty-one thousand, thirty-one".