219789987043 has 4 divisors (see below), whose sum is σ = 239770894968. Its totient is φ = 199809079120.

The previous prime is 219789987037. The next prime is 219789987061. The reversal of 219789987043 is 340789987912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219789987043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 219789987043.

It is not an unprimeable number, because it can be changed into a prime (219789987023) 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, 9990453946 + ... + 9990453967.

It is an arithmetic number, because the mean of its divisors is an integer number (59942723742).

Almost surely, 2^219789987043 is an apocalyptic number.

219789987043 is a deficient number, since it is larger than the sum of its proper divisors (19980907925).

219789987043 is a wasteful number, since it uses less digits than its factorization.

219789987043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19980907924.

The product of its (nonzero) digits is 54867456, while the sum is 67.

The spelling of 219789987043 in words is "two hundred nineteen billion, seven hundred eighty-nine million, nine hundred eighty-seven thousand, forty-three".