2191419538 has 32 divisors (see below), whose sum is σ = 4140517248. Its totient is φ = 844992000.

The previous prime is 2191419521. The next prime is 2191419541. The reversal of 2191419538 is 8359141912.

It is a junction number, because it is equal to n+sod(n) for n = 2191419494 and 2191419503.

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 15 ways as a sum of consecutive naturals, for example, 58413 + ... + 88288.

It is an arithmetic number, because the mean of its divisors is an integer number (129391164).

Almost surely, 2^2191419538 is an apocalyptic number.

2191419538 is a deficient number, since it is larger than the sum of its proper divisors (1949097710).

2191419538 is a wasteful number, since it uses less digits than its factorization.

2191419538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146818.

The product of its digits is 77760, while the sum is 43.

The square root of 2191419538 is about 46812.6002055002. The cubic root of 2191419538 is about 1298.8983839173.

The spelling of 2191419538 in words is "two billion, one hundred ninety-one million, four hundred nineteen thousand, five hundred thirty-eight".