2153726287 has 4 divisors (see below), whose sum is σ = 2163214296. Its totient is φ = 2144238280.

The previous prime is 2153726257. The next prime is 2153726321. The reversal of 2153726287 is 7826273512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2153726287 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 (2153726257) 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, 4743664 + ... + 4744117.

It is an arithmetic number, because the mean of its divisors is an integer number (540803574).

Almost surely, 2^2153726287 is an apocalyptic number.

2153726287 is a deficient number, since it is larger than the sum of its proper divisors (9488009).

2153726287 is an equidigital number, since it uses as much as digits as its factorization.

2153726287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9488008.

The product of its digits is 282240, while the sum is 43.

The square root of 2153726287 is about 46408.2566683990. The cubic root of 2153726287 is about 1291.4080906765.

Adding to 2153726287 its reverse (7826273512), we get a palindrome (9979999799).

The spelling of 2153726287 in words is "two billion, one hundred fifty-three million, seven hundred twenty-six thousand, two hundred eighty-seven".