2100287 has 6 divisors (see below), whose sum is σ = 2443248. Its totient is φ = 1800204.

The previous prime is 2100277. The next prime is 2100313. The reversal of 2100287 is 7820012.

It is not a de Polignac number, because 2100287 - 2⁸ = 2100031 is a prime.

It is a super-2 number, since 2×2100287² = 8822410964738, which contains 22 as substring.

It is a Duffinian number.

2100287 is a modest number, since divided by 287 gives 21 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100227) 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, 21383 + ... + 21480.

It is an arithmetic number, because the mean of its divisors is an integer number (407208).

2^2100287 is an apocalyptic number.

2100287 is a deficient number, since it is larger than the sum of its proper divisors (342961).

2100287 is an equidigital number, since it uses as much as digits as its factorization.

2100287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42877 (or 42870 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 2100287 is about 1449.2366956436. The cubic root of 2100287 is about 128.0637499825.

Adding to 2100287 its reverse (7820012), we get a palindrome (9920299).

The spelling of 2100287 in words is "two million, one hundred thousand, two hundred eighty-seven".