221422413 has 8 divisors (see below), whose sum is σ = 297354400. Its totient is φ = 146552688.

The previous prime is 221422379. The next prime is 221422417. The reversal of 221422413 is 314224122.

221422413 is digitally balanced in base 2, 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 not a de Polignac number, because 221422413 - 2⁶ = 221422349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221422413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221422417) 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, 265078 + ... + 265911.

It is an arithmetic number, because the mean of its divisors is an integer number (37169300).

Almost surely, 2^221422413 is an apocalyptic number.

It is an amenable number.

221422413 is a deficient number, since it is larger than the sum of its proper divisors (75931987).

221422413 is a wasteful number, since it uses less digits than its factorization.

221422413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531131.

The product of its digits is 768, while the sum is 21.

The square root of 221422413 is about 14880.2692515962. The cubic root of 221422413 is about 604.9793158240.

Adding to 221422413 its reverse (314224122), we get a palindrome (535646535).

The spelling of 221422413 in words is "two hundred twenty-one million, four hundred twenty-two thousand, four hundred thirteen".