220495409 has 2 divisors, whose sum is σ = 220495410. Its totient is φ = 220495408.

The previous prime is 220495391. The next prime is 220495427. The reversal of 220495409 is 904594022.

220495409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (220495391) and next prime (220495427).

It can be written as a sum of positive squares in only one way, i.e., 156175009 + 64320400 = 12497^2 + 8020^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220495409 is a prime.

It is not a weakly prime, because it can be changed into another prime (220495309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110247704 + 110247705.

It is an arithmetic number, because the mean of its divisors is an integer number (110247705).

Almost surely, 2^220495409 is an apocalyptic number.

It is an amenable number.

220495409 is a deficient number, since it is larger than the sum of its proper divisors (1).

220495409 is an equidigital number, since it uses as much as digits as its factorization.

220495409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 220495409 is about 14849.0878171018. The cubic root of 220495409 is about 604.1338688773.

The spelling of 220495409 in words is "two hundred twenty million, four hundred ninety-five thousand, four hundred nine".