401132231 has 4 divisors (see below), whose sum is σ = 401490552. Its totient is φ = 400773912.

The previous prime is 401132203. The next prime is 401132243. The reversal of 401132231 is 132231104.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401132231 is a prime.

It is a super-2 number, since 2×401132231² = 321814133494074722, 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 (401162231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177476 + ... + 179721.

It is an arithmetic number, because the mean of its divisors is an integer number (100372638).

Almost surely, 2^401132231 is an apocalyptic number.

401132231 is a deficient number, since it is larger than the sum of its proper divisors (358321).

401132231 is a wasteful number, since it uses less digits than its factorization.

401132231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358320.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 401132231 is about 20028.2857728763. The cubic root of 401132231 is about 737.5008406004.

Adding to 401132231 its reverse (132231104), we get a palindrome (533363335).

The spelling of 401132231 in words is "four hundred one million, one hundred thirty-two thousand, two hundred thirty-one".