2154242305 has 8 divisors (see below), whose sum is σ = 2654958312. Its totient is φ = 1676815488.

The previous prime is 2154242303. The next prime is 2154242309. The reversal of 2154242305 is 5032424512.

It can be written as a sum of positive squares in 4 ways, for example, as 1377003664 + 777238641 = 37108^2 + 27879^2 .

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 2154242305 - 2¹ = 2154242303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2154242303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5822092 + ... + 5822461.

It is an arithmetic number, because the mean of its divisors is an integer number (331869789).

Almost surely, 2^2154242305 is an apocalyptic number.

It is an amenable number.

2154242305 is a deficient number, since it is larger than the sum of its proper divisors (500716007).

2154242305 is a wasteful number, since it uses less digits than its factorization.

2154242305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11644595.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 2154242305 is about 46413.8158849281. The cubic root of 2154242305 is about 1291.5112199383.

Adding to 2154242305 its reverse (5032424512), we get a palindrome (7186666817).

The spelling of 2154242305 in words is "two billion, one hundred fifty-four million, two hundred forty-two thousand, three hundred five".