2003631 has 16 divisors (see below), whose sum is σ = 3097344. Its totient is φ = 1128384.

The previous prime is 2003627. The next prime is 2003633. The reversal of 2003631 is 1363002.

It is not a de Polignac number, because 2003631 - 2² = 2003627 is a prime.

It is a super-2 number, since 2×2003631² = 8029074368322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2003631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003633) 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 15 ways as a sum of consecutive naturals, for example, 880 + ... + 2186.

It is an arithmetic number, because the mean of its divisors is an integer number (193584).

2^2003631 is an apocalyptic number.

2003631 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2003631 is a deficient number, since it is larger than the sum of its proper divisors (1093713).

2003631 is a wasteful number, since it uses less digits than its factorization.

With its successor (2003632) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (1390).

2003631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 2003631 is about 1415.4967325995. The cubic root of 2003631 is about 126.0683051165.

Adding to 2003631 its reverse (1363002), we get a palindrome (3366633).

The spelling of 2003631 in words is "two million, three thousand, six hundred thirty-one".