404242231 has 4 divisors (see below), whose sum is σ = 404296264. Its totient is φ = 404188200.

The previous prime is 404242219. The next prime is 404242243. The reversal of 404242231 is 132242404.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (404242219) and next prime (404242243).

It is a cyclic number.

It is not a de Polignac number, because 404242231 - 2⁵ = 404242199 is a prime.

It is a super-2 number, since 2×404242231² = 326823562647714722, 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 (404242291) 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, 13560 + ... + 31501.

It is an arithmetic number, because the mean of its divisors is an integer number (101074066).

Almost surely, 2^404242231 is an apocalyptic number.

404242231 is a deficient number, since it is larger than the sum of its proper divisors (54033).

404242231 is an equidigital number, since it uses as much as digits as its factorization.

404242231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54032.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 404242231 is about 20105.7760606250. The cubic root of 404242231 is about 739.4018974073.

Adding to 404242231 its reverse (132242404), we get a palindrome (536484635).

The spelling of 404242231 in words is "four hundred four million, two hundred forty-two thousand, two hundred thirty-one".