2154544445 has 8 divisors (see below), whose sum is σ = 2608334136. Its totient is φ = 1708381696.

The previous prime is 2154544429. The next prime is 2154544451. The reversal of 2154544445 is 5444454512.

It can be written as a sum of positive squares in 4 ways, for example, as 71808676 + 2082735769 = 8474^2 + 45637^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2154544445 - 2⁴ = 2154544429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2154544399 and 2154544408.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1906112 + ... + 1907241.

It is an arithmetic number, because the mean of its divisors is an integer number (326041767).

Almost surely, 2^2154544445 is an apocalyptic number.

It is an amenable number.

2154544445 is a deficient number, since it is larger than the sum of its proper divisors (453789691).

2154544445 is a wasteful number, since it uses less digits than its factorization.

2154544445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3813471.

The product of its digits is 256000, while the sum is 38.

The square root of 2154544445 is about 46417.0706206240. The cubic root of 2154544445 is about 1291.5715967674.

Adding to 2154544445 its reverse (5444454512), we get a palindrome (7598998957).

The spelling of 2154544445 in words is "two billion, one hundred fifty-four million, five hundred forty-four thousand, four hundred forty-five".