2154621383 has 4 divisors (see below), whose sum is σ = 2164030440. Its totient is φ = 2145212328.

The previous prime is 2154621367. The next prime is 2154621397. The reversal of 2154621383 is 3831264512.

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 2154621383 - 2⁴ = 2154621367 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 (2154621083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4704185 + ... + 4704642.

It is an arithmetic number, because the mean of its divisors is an integer number (541007610).

Almost surely, 2^2154621383 is an apocalyptic number.

2154621383 is a deficient number, since it is larger than the sum of its proper divisors (9409057).

2154621383 is an equidigital number, since it uses as much as digits as its factorization.

2154621383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9409056.

The product of its digits is 34560, while the sum is 35.

The square root of 2154621383 is about 46417.8993815963. The cubic root of 2154621383 is about 1291.5869704353.

Adding to 2154621383 its reverse (3831264512), we get a palindrome (5985885895).

The spelling of 2154621383 in words is "two billion, one hundred fifty-four million, six hundred twenty-one thousand, three hundred eighty-three".