404621231 has 8 divisors (see below), whose sum is σ = 464060544. Its totient is φ = 345591000.

The previous prime is 404621227. The next prime is 404621237. The reversal of 404621231 is 132126404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404621231 - 2² = 404621227 is a prime.

It is a super-2 number, since 2×404621231² = 327436681151910722, 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 = 404621197 and 404621206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404621237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100145 + ... + 104106.

It is an arithmetic number, because the mean of its divisors is an integer number (58007568).

Almost surely, 2^404621231 is an apocalyptic number.

404621231 is a deficient number, since it is larger than the sum of its proper divisors (59439313).

404621231 is a wasteful number, since it uses less digits than its factorization.

404621231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204541.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 404621231 is about 20115.1990047327. The cubic root of 404621231 is about 739.6329022892.

Adding to 404621231 its reverse (132126404), we get a palindrome (536747635).

The spelling of 404621231 in words is "four hundred four million, six hundred twenty-one thousand, two hundred thirty-one".