404311031 has 4 divisors (see below), whose sum is σ = 410345592. Its totient is φ = 398276472.

The previous prime is 404311007. The next prime is 404311067. The reversal of 404311031 is 130113404.

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 404311031 - 2¹⁰ = 404310007 is a prime.

It is a super-2 number, since 2×404311031² = 326934819576565922, which 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 (404311091) 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, 3017180 + ... + 3017313.

It is an arithmetic number, because the mean of its divisors is an integer number (102586398).

Almost surely, 2^404311031 is an apocalyptic number.

404311031 is a deficient number, since it is larger than the sum of its proper divisors (6034561).

404311031 is an equidigital number, since it uses as much as digits as its factorization.

404311031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6034560.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 404311031 is about 20107.4869389489. The cubic root of 404311031 is about 739.4438425258.

Adding to 404311031 its reverse (130113404), we get a palindrome (534424435).

The spelling of 404311031 in words is "four hundred four million, three hundred eleven thousand, thirty-one".