219936138 has 8 divisors (see below), whose sum is σ = 439872288. Its totient is φ = 73312044.

The previous prime is 219936133. The next prime is 219936149. The reversal of 219936138 is 831639912.

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

219936138 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 219936138.

It is not an unprimeable number, because it can be changed into a prime (219936133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18328006 + ... + 18328017.

It is an arithmetic number, because the mean of its divisors is an integer number (54984036).

Almost surely, 2^219936138 is an apocalyptic number.

219936138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

219936138 is a wasteful number, since it uses less digits than its factorization.

219936138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36656028.

The product of its digits is 69984, while the sum is 42.

The square root of 219936138 is about 14830.2440303590. The cubic root of 219936138 is about 603.6226554803.

The spelling of 219936138 in words is "two hundred nineteen million, nine hundred thirty-six thousand, one hundred thirty-eight".