2106454243 has 4 divisors (see below), whose sum is σ = 2106790840. Its totient is φ = 2106117648.

The previous prime is 2106454219. The next prime is 2106454249. The reversal of 2106454243 is 3424546012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2106454243 is a prime.

It is a super-3 number, since 3×2106454243³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2106454249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158730 + ... + 171487.

It is an arithmetic number, because the mean of its divisors is an integer number (526697710).

Almost surely, 2^2106454243 is an apocalyptic number.

2106454243 is a deficient number, since it is larger than the sum of its proper divisors (336597).

2106454243 is an equidigital number, since it uses as much as digits as its factorization.

2106454243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336596.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 2106454243 is about 45896.1244878040. The cubic root of 2106454243 is about 1281.8897548311.

The spelling of 2106454243 in words is "two billion, one hundred six million, four hundred fifty-four thousand, two hundred forty-three".