2154330443 has 4 divisors (see below), whose sum is σ = 2247997008. Its totient is φ = 2060663880.

The previous prime is 2154330427. The next prime is 2154330449. The reversal of 2154330443 is 3440334512.

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 2154330443 - 2⁴ = 2154330427 is a prime.

It is a super-2 number, since 2×2154330443² = 9282279315273152498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154330449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46833248 + ... + 46833293.

It is an arithmetic number, because the mean of its divisors is an integer number (561999252).

Almost surely, 2^2154330443 is an apocalyptic number.

2154330443 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2154330443 is a deficient number, since it is larger than the sum of its proper divisors (93666565).

2154330443 is an equidigital number, since it uses as much as digits as its factorization.

2154330443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93666564.

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 2154330443 is about 46414.7653554340. The cubic root of 2154330443 is about 1291.5288331943.

Adding to 2154330443 its reverse (3440334512), we get a palindrome (5594664955).

The spelling of 2154330443 in words is "two billion, one hundred fifty-four million, three hundred thirty thousand, four hundred forty-three".