221424313402 has 8 divisors (see below), whose sum is σ = 338403196116. Its totient is φ = 108623248032.

The previous prime is 221424313399. The next prime is 221424313423. The reversal of 221424313402 is 204313424122.

It can be written as a sum of positive squares in 2 ways, for example, as 216251970841 + 5172342561 = 465029^2 + 71919^2 .

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

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, 1044454203 + ... + 1044454414.

Almost surely, 2^221424313402 is an apocalyptic number.

221424313402 is a deficient number, since it is larger than the sum of its proper divisors (116978882714).

221424313402 is a wasteful number, since it uses less digits than its factorization.

221424313402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088908672.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 221424313402 its reverse (204313424122), we get a palindrome (425737737524).

The spelling of 221424313402 in words is "two hundred twenty-one billion, four hundred twenty-four million, three hundred thirteen thousand, four hundred two".