2196820887 has 4 divisors (see below), whose sum is σ = 2929094520. Its totient is φ = 1464547256.

The previous prime is 2196820883. The next prime is 2196820889. The reversal of 2196820887 is 7880286912.

It is a happy number.

2196820887 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 2196820887 - 2² = 2196820883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2196820883) 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, 366136812 + ... + 366136817.

It is an arithmetic number, because the mean of its divisors is an integer number (732273630).

Almost surely, 2^2196820887 is an apocalyptic number.

2196820887 is a deficient number, since it is larger than the sum of its proper divisors (732273633).

2196820887 is an equidigital number, since it uses as much as digits as its factorization.

2196820887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732273632.

The product of its (nonzero) digits is 774144, while the sum is 51.

The square root of 2196820887 is about 46870.2558879296. The cubic root of 2196820887 is about 1299.9646710320.

The spelling of 2196820887 in words is "two billion, one hundred ninety-six million, eight hundred twenty thousand, eight hundred eighty-seven".