2195718953 has 6 divisors (see below), whose sum is σ = 2202988986. Its totient is φ = 2188472832.

The previous prime is 2195718923. The next prime is 2195718991. The reversal of 2195718953 is 3598175912.

It can be written as a sum of positive squares in only one way, i.e., 1449172624 + 746546329 = 38068^2 + 27323^2 .

It is not a de Polignac number, because 2195718953 - 2²⁶ = 2128610089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2195718923) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 82601 + ... + 105897.

It is an arithmetic number, because the mean of its divisors is an integer number (367164831).

Almost surely, 2^2195718953 is an apocalyptic number.

It is an amenable number.

2195718953 is a deficient number, since it is larger than the sum of its proper divisors (7270033).

2195718953 is an frugal number, since it uses more digits than its factorization.

2195718953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23911 (or 23604 counting only the distinct ones).

The product of its digits is 680400, while the sum is 50.

The square root of 2195718953 is about 46858.4992610732. The cubic root of 2195718953 is about 1299.7472788819.

The spelling of 2195718953 in words is "two billion, one hundred ninety-five million, seven hundred eighteen thousand, nine hundred fifty-three".