221022413 has 4 divisors (see below), whose sum is σ = 221733408. Its totient is φ = 220311420.

The previous prime is 221022407. The next prime is 221022469. The reversal of 221022413 is 314220122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221022413 - 2⁴ = 221022397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221022391 and 221022400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022493) 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, 355031 + ... + 355652.

It is an arithmetic number, because the mean of its divisors is an integer number (55433352).

Almost surely, 2^221022413 is an apocalyptic number.

It is an amenable number.

221022413 is a deficient number, since it is larger than the sum of its proper divisors (710995).

221022413 is an equidigital number, since it uses as much as digits as its factorization.

221022413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710994.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 221022413 is about 14866.8225589734. The cubic root of 221022413 is about 604.6147974826.

Adding to 221022413 its reverse (314220122), we get a palindrome (535242535).

The spelling of 221022413 in words is "two hundred twenty-one million, twenty-two thousand, four hundred thirteen".