2108451287 has 4 divisors (see below), whose sum is σ = 2138147856. Its totient is φ = 2078754720.

The previous prime is 2108451277. The next prime is 2108451311. The reversal of 2108451287 is 7821548012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2108451287 - 2¹⁸ = 2108189143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2108451287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108451217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14848178 + ... + 14848319.

It is an arithmetic number, because the mean of its divisors is an integer number (534536964).

Almost surely, 2^2108451287 is an apocalyptic number.

2108451287 is a deficient number, since it is larger than the sum of its proper divisors (29696569).

2108451287 is an equidigital number, since it uses as much as digits as its factorization.

2108451287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29696568.

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 2108451287 is about 45917.8754626126. The cubic root of 2108451287 is about 1282.2947294735.

Adding to 2108451287 its reverse (7821548012), we get a palindrome (9929999299).

The spelling of 2108451287 in words is "two billion, one hundred eight million, four hundred fifty-one thousand, two hundred eighty-seven".