2195663251 has 4 divisors (see below), whose sum is σ = 2196621432. Its totient is φ = 2194705072.

The previous prime is 2195663227. The next prime is 2195663263. The reversal of 2195663251 is 1523665912.

2195663251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2195663251 - 2²¹ = 2193566099 is a prime.

It is a super-2 number, since 2×2195663251² = 9641874223583778002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2195603251) 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, 475645 + ... + 480238.

It is an arithmetic number, because the mean of its divisors is an integer number (549155358).

Almost surely, 2^2195663251 is an apocalyptic number.

2195663251 is a deficient number, since it is larger than the sum of its proper divisors (958181).

2195663251 is an equidigital number, since it uses as much as digits as its factorization.

2195663251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958180.

The product of its digits is 97200, while the sum is 40.

The square root of 2195663251 is about 46857.9048934115. The cubic root of 2195663251 is about 1299.7362879283.

The spelling of 2195663251 in words is "two billion, one hundred ninety-five million, six hundred sixty-three thousand, two hundred fifty-one".