2118197253 has 4 divisors (see below), whose sum is σ = 2824263008. Its totient is φ = 1412131500.

The previous prime is 2118197251. The next prime is 2118197281. The reversal of 2118197253 is 3527918112.

It is a happy number.

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 2118197253 - 2¹ = 2118197251 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 (2118197251) 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, 353032873 + ... + 353032878.

It is an arithmetic number, because the mean of its divisors is an integer number (706065752).

Almost surely, 2^2118197253 is an apocalyptic number.

It is an amenable number.

2118197253 is a deficient number, since it is larger than the sum of its proper divisors (706065755).

2118197253 is an equidigital number, since it uses as much as digits as its factorization.

2118197253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706065754.

The product of its digits is 30240, while the sum is 39.

The square root of 2118197253 is about 46023.8769879288. The cubic root of 2118197253 is about 1284.2674245975.

The spelling of 2118197253 in words is "two billion, one hundred eighteen million, one hundred ninety-seven thousand, two hundred fifty-three".