1219213194 has 16 divisors (see below), whose sum is σ = 2439389568. Its totient is φ = 406243872.

The previous prime is 1219213153. The next prime is 1219213199. The reversal of 1219213194 is 4913129121.

It is not an unprimeable number, because it can be changed into a prime (1219213199) 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, 23122 + ... + 54525.

It is an arithmetic number, because the mean of its divisors is an integer number (152461848).

Almost surely, 2^1219213194 is an apocalyptic number.

1219213194 is an abundant number, since it is smaller than the sum of its proper divisors (1220176374).

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

1219213194 is a wasteful number, since it uses less digits than its factorization.

1219213194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80269.

The product of its digits is 3888, while the sum is 33.

The square root of 1219213194 is about 34917.2334814773. The cubic root of 1219213194 is about 1068.2999743013.

The spelling of 1219213194 in words is "one billion, two hundred nineteen million, two hundred thirteen thousand, one hundred ninety-four".