1331333001 has 12 divisors (see below), whose sum is σ = 1975011012. Its totient is φ = 863567136.

The previous prime is 1331332987. The next prime is 1331333041. The reversal of 1331333001 is 1003331331.

1331333001 is a `hidden beast` number, since 1 + 331 + 3 + 330 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 867361401 + 463971600 = 29451^2 + 21540^2 .

It is not a de Polignac number, because 1331333001 - 2¹¹ = 1331330953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1331333041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1998666 + ... + 1999331.

It is an arithmetic number, because the mean of its divisors is an integer number (164584251).

Almost surely, 2^1331333001 is an apocalyptic number.

It is an amenable number.

1331333001 is a deficient number, since it is larger than the sum of its proper divisors (643678011).

1331333001 is a wasteful number, since it uses less digits than its factorization.

1331333001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3998040 (or 3998037 counting only the distinct ones).

The product of its (nonzero) digits is 243, while the sum is 18.

The square root of 1331333001 is about 36487.4362075496. The cubic root of 1331333001 is about 1100.0917281633.

Adding to 1331333001 its reverse (1003331331), we get a palindrome (2334664332).

The spelling of 1331333001 in words is "one billion, three hundred thirty-one million, three hundred thirty-three thousand, one".