4001331 has 4 divisors (see below), whose sum is σ = 5335112. Its totient is φ = 2667552.

The previous prime is 4001303. The next prime is 4001339. The reversal of 4001331 is 1331004.

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

It is not a de Polignac number, because 4001331 - 2¹¹ = 3999283 is a prime.

It is a super-2 number, since 2×4001331² = 32021299543122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4001339) 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, 666886 + ... + 666891.

It is an arithmetic number, because the mean of its divisors is an integer number (1333778).

Almost surely, 2^4001331 is an apocalyptic number.

4001331 is a deficient number, since it is larger than the sum of its proper divisors (1333781).

4001331 is a wasteful number, since it uses less digits than its factorization.

4001331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333780.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 4001331 is about 2000.3327223240. The cubic root of 4001331 is about 158.7577101676.

Adding to 4001331 its reverse (1331004), we get a palindrome (5332335).

The spelling of 4001331 in words is "four million, one thousand, three hundred thirty-one".