219491393006 has 4 divisors (see below), whose sum is σ = 329237089512. Its totient is φ = 109745696502.

The previous prime is 219491392999. The next prime is 219491393053. The reversal of 219491393006 is 600393194912.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54872848250 + ... + 54872848253.

It is an arithmetic number, because the mean of its divisors is an integer number (82309272378).

Almost surely, 2^219491393006 is an apocalyptic number.

219491393006 is a deficient number, since it is larger than the sum of its proper divisors (109745696506).

219491393006 is a wasteful number, since it uses less digits than its factorization.

219491393006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109745696505.

The product of its (nonzero) digits is 314928, while the sum is 47.

The spelling of 219491393006 in words is "two hundred nineteen billion, four hundred ninety-one million, three hundred ninety-three thousand, six".