2002631 has 4 divisors (see below), whose sum is σ = 2067264. Its totient is φ = 1938000.

The previous prime is 2002621. The next prime is 2002643. The reversal of 2002631 is 1362002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1362002 = 2 ⋅681001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2002631 is a prime.

It is a super-2 number, since 2×2002631² = 8021061844322, 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 (2002621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32270 + ... + 32331.

It is an arithmetic number, because the mean of its divisors is an integer number (516816).

2^2002631 is an apocalyptic number.

2002631 is a deficient number, since it is larger than the sum of its proper divisors (64633).

2002631 is an equidigital number, since it uses as much as digits as its factorization.

2002631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64632.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2002631 is about 1415.1434556256. The cubic root of 2002631 is about 126.0473283192.

Adding to 2002631 its reverse (1362002), we get a palindrome (3364633).

The spelling of 2002631 in words is "two million, two thousand, six hundred thirty-one".