2153802891 has 4 divisors (see below), whose sum is σ = 2871737192. Its totient is φ = 1435868592.

The previous prime is 2153802851. The next prime is 2153802919. The reversal of 2153802891 is 1982083512.

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

It is not a de Polignac number, because 2153802891 - 2¹⁵ = 2153770123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2153802851) by changing a digit.

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, 358967146 + ... + 358967151.

It is an arithmetic number, because the mean of its divisors is an integer number (717934298).

Almost surely, 2^2153802891 is an apocalyptic number.

2153802891 is a deficient number, since it is larger than the sum of its proper divisors (717934301).

2153802891 is an equidigital number, since it uses as much as digits as its factorization.

2153802891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717934300.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 2153802891 is about 46409.0819883350. The cubic root of 2153802891 is about 1291.4234014819.

The spelling of 2153802891 in words is "two billion, one hundred fifty-three million, eight hundred two thousand, eight hundred ninety-one".