219491393056 has 48 divisors (see below), whose sum is σ = 471254716800. Its totient is φ = 100021379328.

The previous prime is 219491393053. The next prime is 219491393087. The reversal of 219491393056 is 650393194912.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 219491392994 and 219491393012.

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 7 ways as a sum of consecutive naturals, for example, 3306526 + ... + 3372253.

It is an arithmetic number, because the mean of its divisors is an integer number (9817806600).

Almost surely, 2^219491393056 is an apocalyptic number.

219491393056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

219491393056 is an abundant number, since it is smaller than the sum of its proper divisors (251763323744).

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

219491393056 is a wasteful number, since it uses less digits than its factorization.

219491393056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6678881 (or 6678873 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 52.

The spelling of 219491393056 in words is "two hundred nineteen billion, four hundred ninety-one million, three hundred ninety-three thousand, fifty-six".