2154162305 has 4 divisors (see below), whose sum is σ = 2584994772. Its totient is φ = 1723329840.

The previous prime is 2154162299. The next prime is 2154162343. The reversal of 2154162305 is 5032614512.

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 386043904 + 1768118401 = 19648^2 + 42049^2 .

It is not a de Polignac number, because 2154162305 - 2⁴ = 2154162289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215416226 + ... + 215416235.

It is an arithmetic number, because the mean of its divisors is an integer number (646248693).

Almost surely, 2^2154162305 is an apocalyptic number.

It is an amenable number.

2154162305 is a deficient number, since it is larger than the sum of its proper divisors (430832467).

2154162305 is an equidigital number, since it uses as much as digits as its factorization.

2154162305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430832466.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 2154162305 is about 46412.9540645712. The cubic root of 2154162305 is about 1291.4952325420.

Adding to 2154162305 its reverse (5032614512), we get a palindrome (7186776817).

The spelling of 2154162305 in words is "two billion, one hundred fifty-four million, one hundred sixty-two thousand, three hundred five".