401311331 has 4 divisors (see below), whose sum is σ = 422433000. Its totient is φ = 380189664.

The previous prime is 401311327. The next prime is 401311349. The reversal of 401311331 is 133113104.

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 401311331 - 2² = 401311327 is a prime.

It is a super-2 number, since 2×401311331² = 322101568777983122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401311301) 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, 10560806 + ... + 10560843.

It is an arithmetic number, because the mean of its divisors is an integer number (105608250).

Almost surely, 2^401311331 is an apocalyptic number.

401311331 is a deficient number, since it is larger than the sum of its proper divisors (21121669).

401311331 is a wasteful number, since it uses less digits than its factorization.

401311331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21121668.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 401311331 is about 20032.7564503740. The cubic root of 401311331 is about 737.6105855814.

Adding to 401311331 its reverse (133113104), we get a palindrome (534424435).

The spelling of 401311331 in words is "four hundred one million, three hundred eleven thousand, three hundred thirty-one".