404120231 has 4 divisors (see below), whose sum is σ = 413976864. Its totient is φ = 394263600.

The previous prime is 404120219. The next prime is 404120239. The reversal of 404120231 is 132021404.

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 404120231 - 2¹⁸ = 403858087 is a prime.

It is a super-2 number, since 2×404120231² = 326626322206986722, 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 (404120239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4928255 + ... + 4928336.

It is an arithmetic number, because the mean of its divisors is an integer number (103494216).

Almost surely, 2^404120231 is an apocalyptic number.

404120231 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

404120231 is a deficient number, since it is larger than the sum of its proper divisors (9856633).

404120231 is an equidigital number, since it uses as much as digits as its factorization.

404120231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9856632.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 404120231 is about 20102.7418776644. The cubic root of 404120231 is about 739.3275062783.

Adding to 404120231 its reverse (132021404), we get a palindrome (536141635).

The spelling of 404120231 in words is "four hundred four million, one hundred twenty thousand, two hundred thirty-one".