220221413 has 4 divisors (see below), whose sum is σ = 224376588. Its totient is φ = 216066240.

The previous prime is 220221409. The next prime is 220221431. The reversal of 220221413 is 314122022.

220221413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129914404 + 90307009 = 11398^2 + 9503^2 .

It is a cyclic number.

It is not a de Polignac number, because 220221413 - 2² = 220221409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220221391 and 220221400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2077508 + ... + 2077613.

It is an arithmetic number, because the mean of its divisors is an integer number (56094147).

Almost surely, 2^220221413 is an apocalyptic number.

It is an amenable number.

220221413 is a deficient number, since it is larger than the sum of its proper divisors (4155175).

220221413 is an equidigital number, since it uses as much as digits as its factorization.

220221413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4155174.

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

The square root of 220221413 is about 14839.8589279009. The cubic root of 220221413 is about 603.8835252285.

Adding to 220221413 its reverse (314122022), we get a palindrome (534343435).

The spelling of 220221413 in words is "two hundred twenty million, two hundred twenty-one thousand, four hundred thirteen".