243221394 has 32 divisors (see below), whose sum is σ = 551436480. Its totient is φ = 70898112.

The previous prime is 243221393. The next prime is 243221411. The reversal of 243221394 is 493122342.

It is not an unprimeable number, because it can be changed into a prime (243221393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80577 + ... + 83540.

It is an arithmetic number, because the mean of its divisors is an integer number (17232390).

Almost surely, 2^243221394 is an apocalyptic number.

243221394 is an abundant number, since it is smaller than the sum of its proper divisors (308215086).

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

243221394 is a wasteful number, since it uses less digits than its factorization.

243221394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164154.

The product of its digits is 10368, while the sum is 30.

The square root of 243221394 is about 15595.5568672619. The cubic root of 243221394 is about 624.2146030026.

The spelling of 243221394 in words is "two hundred forty-three million, two hundred twenty-one thousand, three hundred ninety-four".