2163278253 has 4 divisors (see below), whose sum is σ = 2884371008. Its totient is φ = 1442185500.

The previous prime is 2163278191. The next prime is 2163278279. The reversal of 2163278253 is 3528723612.

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 2163278253 - 2²¹ = 2161181101 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 (2163276253) 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, 360546373 + ... + 360546378.

It is an arithmetic number, because the mean of its divisors is an integer number (721092752).

Almost surely, 2^2163278253 is an apocalyptic number.

It is an amenable number.

2163278253 is a deficient number, since it is larger than the sum of its proper divisors (721092755).

2163278253 is an equidigital number, since it uses as much as digits as its factorization.

2163278253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721092754.

The product of its digits is 120960, while the sum is 39.

The square root of 2163278253 is about 46511.0551697121. The cubic root of 2163278253 is about 1293.3144447517.

The spelling of 2163278253 in words is "two billion, one hundred sixty-three million, two hundred seventy-eight thousand, two hundred fifty-three".