2194661523 has 16 divisors (see below), whose sum is σ = 3032395776. Its totient is φ = 1410385920.

The previous prime is 2194661509. The next prime is 2194661533. The reversal of 2194661523 is 3251664912.

It is not a de Polignac number, because 2194661523 - 2⁹ = 2194661011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2194661533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22011 + ... + 69812.

It is an arithmetic number, because the mean of its divisors is an integer number (189524736).

Almost surely, 2^2194661523 is an apocalyptic number.

2194661523 is a deficient number, since it is larger than the sum of its proper divisors (837734253).

2194661523 is a wasteful number, since it uses less digits than its factorization.

2194661523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92114.

The product of its digits is 77760, while the sum is 39.

The square root of 2194661523 is about 46847.2146770755. The cubic root of 2194661523 is about 1299.5385981895.

The spelling of 2194661523 in words is "two billion, one hundred ninety-four million, six hundred sixty-one thousand, five hundred twenty-three".