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220345409 is a prime number
BaseRepresentation
bin11010010001000…
…11010001000001
3120100121201002002
431020203101001
5422402023114
633510433345
75313622304
oct1510432101
9510551062
10220345409
11103419849
1261962855
133685b9cb
142139ab3b
15145277de
hexd223441

220345409 has 2 divisors, whose sum is σ = 220345410. Its totient is φ = 220345408.

The previous prime is 220345369. The next prime is 220345417. The reversal of 220345409 is 904543022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219484225 + 861184 = 14815^2 + 928^2 .

It is a cyclic number.

It is not a de Polignac number, because 220345409 - 212 = 220341313 is a prime.

It is not a weakly prime, because it can be changed into another prime (220645409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110172704 + 110172705.

It is an arithmetic number, because the mean of its divisors is an integer number (110172705).

Almost surely, 2220345409 is an apocalyptic number.

It is an amenable number.

220345409 is a deficient number, since it is larger than the sum of its proper divisors (1).

220345409 is an equidigital number, since it uses as much as digits as its factorization.

220345409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 220345409 is about 14844.0361425052. The cubic root of 220345409 is about 603.9968431410.

The spelling of 220345409 in words is "two hundred twenty million, three hundred forty-five thousand, four hundred nine".