2002001031 has 6 divisors (see below), whose sum is σ = 2891779280. Its totient is φ = 1334667348.

The previous prime is 2002001021. The next prime is 2002001033. The reversal of 2002001031 is 1301002002.

It is a happy number.

It is not a de Polignac number, because 2002001031 - 2¹¹ = 2001998983 is a prime.

It is a super-2 number, since 2×2002001031² = 8016016256250125922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 222444559 = 2002001031 / (2 + 0 + 0 + 2 + 0 + 0 + 1 + 0 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002001033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111222271 + ... + 111222288.

Almost surely, 2^2002001031 is an apocalyptic number.

2002001031 is a deficient number, since it is larger than the sum of its proper divisors (889778249).

2002001031 is a wasteful number, since it uses less digits than its factorization.

2002001031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222444565 (or 222444562 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 2002001031 is about 44743.7261635640. The cubic root of 2002001031 is about 1260.3411000169.

Adding to 2002001031 its reverse (1301002002), we get a palindrome (3303003033).

The spelling of 2002001031 in words is "two billion, two million, one thousand, thirty-one".