401143231 has 4 divisors (see below), whose sum is σ = 403462152. Its totient is φ = 398824312.

The previous prime is 401143229. The next prime is 401143243. The reversal of 401143231 is 132341104.

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 401143231 - 2¹ = 401143229 is a prime.

It is a super-2 number, since 2×401143231² = 321831783554238722, 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 = 401143199 and 401143208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401143201) 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, 1159201 + ... + 1159546.

It is an arithmetic number, because the mean of its divisors is an integer number (100865538).

Almost surely, 2^401143231 is an apocalyptic number.

401143231 is a deficient number, since it is larger than the sum of its proper divisors (2318921).

401143231 is a wasteful number, since it uses less digits than its factorization.

401143231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318920.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 401143231 is about 20028.5603826136. The cubic root of 401143231 is about 737.5075818813.

Adding to 401143231 its reverse (132341104), we get a palindrome (533484335).

The spelling of 401143231 in words is "four hundred one million, one hundred forty-three thousand, two hundred thirty-one".