2100154453 has 4 divisors (see below), whose sum is σ = 2100647500. Its totient is φ = 2099661408.

The previous prime is 2100154411. The next prime is 2100154457. The reversal of 2100154453 is 3544510012.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1354755249 + 745399204 = 36807^2 + 27302^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100154453 - 2²¹ = 2098057301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100154457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240078 + ... + 248671.

It is an arithmetic number, because the mean of its divisors is an integer number (525161875).

Almost surely, 2^2100154453 is an apocalyptic number.

It is an amenable number.

2100154453 is a deficient number, since it is larger than the sum of its proper divisors (493047).

2100154453 is an equidigital number, since it uses as much as digits as its factorization.

2100154453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493046.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2100154453 is about 45827.4421389630. The cubic root of 2100154453 is about 1280.6105593438.

Adding to 2100154453 its reverse (3544510012), we get a palindrome (5644664465).

The spelling of 2100154453 in words is "two billion, one hundred million, one hundred fifty-four thousand, four hundred fifty-three".