219197138 has 8 divisors (see below), whose sum is σ = 340133580. Its totient is φ = 105819280.

The previous prime is 219197119. The next prime is 219197149. The reversal of 219197138 is 831791912.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 191075329 + 28121809 = 13823^2 + 5303^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 219197095 and 219197104.

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 3 ways as a sum of consecutive naturals, for example, 1889573 + ... + 1889688.

Almost surely, 2^219197138 is an apocalyptic number.

219197138 is a deficient number, since it is larger than the sum of its proper divisors (120936442).

219197138 is a wasteful number, since it uses less digits than its factorization.

219197138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779292.

The product of its digits is 27216, while the sum is 41.

The square root of 219197138 is about 14805.3077644472. The cubic root of 219197138 is about 602.9458261403.

The spelling of 219197138 in words is "two hundred nineteen million, one hundred ninety-seven thousand, one hundred thirty-eight".