219491393054 has 8 divisors (see below), whose sum is σ = 340590092760. Its totient is φ = 105961362136.

The previous prime is 219491393053. The next prime is 219491393087. The reversal of 219491393054 is 450393194912.

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 = 219491392993 and 219491393011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219491393053) 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, 1892167124 + ... + 1892167239.

It is an arithmetic number, because the mean of its divisors is an integer number (42573761595).

Almost surely, 2^219491393054 is an apocalyptic number.

219491393054 is a deficient number, since it is larger than the sum of its proper divisors (121098699706).

219491393054 is a wasteful number, since it uses less digits than its factorization.

219491393054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784334394.

The product of its (nonzero) digits is 1049760, while the sum is 50.

The spelling of 219491393054 in words is "two hundred nineteen billion, four hundred ninety-one million, three hundred ninety-three thousand, fifty-four".