401023231 has 8 divisors (see below), whose sum is σ = 463462560. Its totient is φ = 339871488.

The previous prime is 401023229. The next prime is 401023307. The reversal of 401023231 is 132320104.

It is a happy number.

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 401023231 - 2¹ = 401023229 is a prime.

It is a super-2 number, since 2×401023231² = 321639263603358722, 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 (401003231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321226 + ... + 322471.

It is an arithmetic number, because the mean of its divisors is an integer number (57932820).

Almost surely, 2^401023231 is an apocalyptic number.

401023231 is a deficient number, since it is larger than the sum of its proper divisors (62439329).

401023231 is an equidigital number, since it uses as much as digits as its factorization.

401023231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643793.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 401023231 is about 20025.5644364897. The cubic root of 401023231 is about 737.4340339734.

Adding to 401023231 its reverse (132320104), we get a palindrome (533343335).

The spelling of 401023231 in words is "four hundred one million, twenty-three thousand, two hundred thirty-one".