2001001031 has 8 divisors (see below), whose sum is σ = 2126043360. Its totient is φ = 1883290464.

The previous prime is 2001001019. The next prime is 2001001091. The reversal of 2001001031 is 1301001002.

It is not a de Polignac number, because 2001001031 - 2²² = 1996806727 is a prime.

It is a super-2 number, since 2×2001001031² = 8008010252126125922, 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 (2001001091) 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 7 ways as a sum of consecutive naturals, for example, 198731 + ... + 208556.

It is an arithmetic number, because the mean of its divisors is an integer number (265755420).

Almost surely, 2^2001001031 is an apocalyptic number.

2001001031 is a deficient number, since it is larger than the sum of its proper divisors (125042329).

2001001031 is an frugal number, since it uses more digits than its factorization.

2001001031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407338 (or 407304 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 2001001031 is about 44732.5500167384. The cubic root of 2001001031 is about 1260.1312181727.

Adding to 2001001031 its reverse (1301001002), we get a palindrome (3302002033).

The spelling of 2001001031 in words is "two billion, one million, one thousand, thirty-one".