2196523691 has 2 divisors, whose sum is σ = 2196523692. Its totient is φ = 2196523690.

The previous prime is 2196523687. The next prime is 2196523697. The reversal of 2196523691 is 1963256912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2196523691 - 2² = 2196523687 is a prime.

It is not a weakly prime, because it can be changed into another prime (2196523697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098261845 + 1098261846.

It is an arithmetic number, because the mean of its divisors is an integer number (1098261846).

Almost surely, 2^2196523691 is an apocalyptic number.

2196523691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2196523691 is an equidigital number, since it uses as much as digits as its factorization.

2196523691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 44.

The square root of 2196523691 is about 46867.0853691586. The cubic root of 2196523691 is about 1299.9060466617.

The spelling of 2196523691 in words is "two billion, one hundred ninety-six million, five hundred twenty-three thousand, six hundred ninety-one".