220413421 has 2 divisors, whose sum is σ = 220413422. Its totient is φ = 220413420.

The previous prime is 220413407. The next prime is 220413437. The reversal of 220413421 is 124314022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171217225 + 49196196 = 13085^2 + 7014^2 .

It is a cyclic number.

It is not a de Polignac number, because 220413421 - 2⁹ = 220412909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220413121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110206710 + 110206711.

It is an arithmetic number, because the mean of its divisors is an integer number (110206711).

Almost surely, 2^220413421 is an apocalyptic number.

It is an amenable number.

220413421 is a deficient number, since it is larger than the sum of its proper divisors (1).

220413421 is an equidigital number, since it uses as much as digits as its factorization.

220413421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 220413421 is about 14846.3268521207. The cubic root of 220413421 is about 604.0589801402.

Adding to 220413421 its reverse (124314022), we get a palindrome (344727443).

It can be divided in two parts, 2204 and 13421, that added together give a 6-th power (15625 = 5⁶).

The spelling of 220413421 in words is "two hundred twenty million, four hundred thirteen thousand, four hundred twenty-one".