2002311 has 24 divisors (see below), whose sum is σ = 3201120. Its totient is φ = 1199616.

The previous prime is 2002307. The next prime is 2002313. The reversal of 2002311 is 1132002.

It is a happy number.

It is not a de Polignac number, because 2002311 - 2² = 2002307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 2002293 and 2002302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002313) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3235 + ... + 3803.

It is an arithmetic number, because the mean of its divisors is an integer number (133380).

2^2002311 is an apocalyptic number.

2002311 is a deficient number, since it is larger than the sum of its proper divisors (1198809).

2002311 is a wasteful number, since it uses less digits than its factorization.

2002311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 612 counting only the distinct ones).

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

The square root of 2002311 is about 1415.0303883663. The cubic root of 2002311 is about 126.0406142692.

Adding to 2002311 its reverse (1132002), we get a palindrome (3134313).

The spelling of 2002311 in words is "two million, two thousand, three hundred eleven".