221919494 has 8 divisors (see below), whose sum is σ = 332952168. Its totient is φ = 110935440.

The previous prime is 221919491. The next prime is 221919499. The reversal of 221919494 is 494919122.

221919494 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221919491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3074 + ... + 21290.

It is an arithmetic number, because the mean of its divisors is an integer number (41619021).

Almost surely, 2^221919494 is an apocalyptic number.

221919494 is a deficient number, since it is larger than the sum of its proper divisors (111032674).

221919494 is a wasteful number, since it uses less digits than its factorization.

221919494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24310.

The product of its digits is 46656, while the sum is 41.

The square root of 221919494 is about 14896.9625763106. The cubic root of 221919494 is about 605.4316924428.

The spelling of 221919494 in words is "two hundred twenty-one million, nine hundred nineteen thousand, four hundred ninety-four".