2153220789 has 4 divisors (see below), whose sum is σ = 2870961056. Its totient is φ = 1435480524.

The previous prime is 2153220781. The next prime is 2153220863. The reversal of 2153220789 is 9870223512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2153220789 - 2³ = 2153220781 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 (2153220781) 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, 358870129 + ... + 358870134.

It is an arithmetic number, because the mean of its divisors is an integer number (717740264).

Almost surely, 2^2153220789 is an apocalyptic number.

It is an amenable number.

2153220789 is a deficient number, since it is larger than the sum of its proper divisors (717740267).

2153220789 is an equidigital number, since it uses as much as digits as its factorization.

2153220789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717740266.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 2153220789 is about 46402.8101411973. The cubic root of 2153220789 is about 1291.3070479255.

The spelling of 2153220789 in words is "two billion, one hundred fifty-three million, two hundred twenty thousand, seven hundred eighty-nine".