243220402 has 8 divisors (see below), whose sum is σ = 365054976. Its totient is φ = 121535412.

The previous prime is 243220391. The next prime is 243220421. The reversal of 243220402 is 204022342.

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

It is a self number, because there is not a number n which added to its sum of digits gives 243220402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33238 + ... + 39889.

It is an arithmetic number, because the mean of its divisors is an integer number (45631872).

Almost surely, 2^243220402 is an apocalyptic number.

243220402 is a deficient number, since it is larger than the sum of its proper divisors (121834574).

243220402 is a wasteful number, since it uses less digits than its factorization.

243220402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74792.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 243220402 is about 15595.5250632994. The cubic root of 243220402 is about 624.2137543632.

Adding to 243220402 its reverse (204022342), we get a palindrome (447242744).

The spelling of 243220402 in words is "two hundred forty-three million, two hundred twenty thousand, four hundred two".