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220427353 = 349631597
BaseRepresentation
bin11010010001101…
…11010001011001
3120100202212111001
431020313101121
5422412133403
633512305001
75314413226
oct1510672131
9510685431
10220427353
11103475373
12619a2161
133688a0b3
14213bc94d
1514541c1d
hexd237459

220427353 has 4 divisors (see below), whose sum is σ = 221059300. Its totient is φ = 219795408.

The previous prime is 220427351. The next prime is 220427393. The reversal of 220427353 is 353724022.

220427353 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, and also an emirpimes, since its reverse is a distinct semiprime: 353724022 = 2176862011.

It can be written as a sum of positive squares in 2 ways, for example, as 123365449 + 97061904 = 11107^2 + 9852^2 .

It is a cyclic number.

It is not a de Polignac number, because 220427353 - 21 = 220427351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220427351) 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, 315450 + ... + 316147.

It is an arithmetic number, because the mean of its divisors is an integer number (55264825).

Almost surely, 2220427353 is an apocalyptic number.

It is an amenable number.

220427353 is a deficient number, since it is larger than the sum of its proper divisors (631947).

220427353 is an equidigital number, since it uses as much as digits as its factorization.

220427353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631946.

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 220427353 is about 14846.7960516739. The cubic root of 220427353 is about 604.0717070912.

It can be divided in two parts, 220427 and 353, that added together give a triangular number (220780 = T664).

The spelling of 220427353 in words is "two hundred twenty million, four hundred twenty-seven thousand, three hundred fifty-three".

Divisors: 1 349 631597 220427353