2153444651 has 4 divisors (see below), whose sum is σ = 2153547672. Its totient is φ = 2153341632.

The previous prime is 2153444633. The next prime is 2153444719. The reversal of 2153444651 is 1564443512.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2153444651 - 2²⁶ = 2086335787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153444351) 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, 7781 + ... + 66086.

It is an arithmetic number, because the mean of its divisors is an integer number (538386918).

Almost surely, 2^2153444651 is an apocalyptic number.

2153444651 is a deficient number, since it is larger than the sum of its proper divisors (103021).

2153444651 is an equidigital number, since it uses as much as digits as its factorization.

2153444651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103020.

The product of its digits is 57600, while the sum is 35.

The square root of 2153444651 is about 46405.2222384507. Note that the first 4 decimals coincide. The cubic root of 2153444651 is about 1291.3517971004.

The spelling of 2153444651 in words is "two billion, one hundred fifty-three million, four hundred forty-four thousand, six hundred fifty-one".