219491393052 has 24 divisors (see below), whose sum is σ = 512159227776. Its totient is φ = 73161991408.

The previous prime is 219491392999. The next prime is 219491393053. The reversal of 219491393052 is 250393194912.

It is a junction number, because it is equal to n+sod(n) for n = 219491392992 and 219491393010.

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 7 ways as a sum of consecutive naturals, for example, 336553 + ... + 743135.

It is an arithmetic number, because the mean of its divisors is an integer number (21339967824).

Almost surely, 2^219491393052 is an apocalyptic number.

It is an amenable number.

219491393052 is an abundant number, since it is smaller than the sum of its proper divisors (292667834724).

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

219491393052 is a wasteful number, since it uses less digits than its factorization.

219491393052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451577 (or 451575 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 48.

The spelling of 219491393052 in words is "two hundred nineteen billion, four hundred ninety-one million, three hundred ninety-three thousand, fifty-two".