2191996052 has 24 divisors (see below), whose sum is σ = 3873108960. Its totient is φ = 1085444000.

The previous prime is 2191996049. The next prime is 2191996061. The reversal of 2191996052 is 2506991912.

It is a junction number, because it is equal to n+sod(n) for n = 2191995994 and 2191996012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173618 + ... + 185814.

It is an arithmetic number, because the mean of its divisors is an integer number (161379540).

Almost surely, 2^2191996052 is an apocalyptic number.

It is an amenable number.

2191996052 is a deficient number, since it is larger than the sum of its proper divisors (1681112908).

2191996052 is a wasteful number, since it uses less digits than its factorization.

2191996052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12631 (or 12629 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 2191996052 is about 46818.7574803091. The cubic root of 2191996052 is about 1299.0122777401.

The spelling of 2191996052 in words is "two billion, one hundred ninety-one million, nine hundred ninety-six thousand, fifty-two".