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613220220 = 22365137307
BaseRepresentation
bin100100100011001…
…111111101111100
31120201212211000000
4210203033331330
52223441021340
6140503234300
721124200024
oct4443177574
91521784000
10613220220
11295168478
12151448990
139a077102
145b628a84
1538c7ed30
hex248cff7c

613220220 has 168 divisors, whose sum is σ = 1951188624. Its totient is φ = 161803008.

The previous prime is 613220213. The next prime is 613220249. The reversal of 613220220 is 22022316.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 613220193 and 613220202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1997307 + ... + 1997613.

It is an arithmetic number, because the mean of its divisors is an integer number (11614218).

Almost surely, 2613220220 is an apocalyptic number.

613220220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 613220220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (975594312).

613220220 is an abundant number, since it is smaller than the sum of its proper divisors (1337968404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

613220220 is a wasteful number, since it uses less digits than its factorization.

613220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 613220220 is about 24763.2837079415. The cubic root of 613220220 is about 849.5823646153.

Adding to 613220220 its reverse (22022316), we get a palindrome (635242536).

The spelling of 613220220 in words is "six hundred thirteen million, two hundred twenty thousand, two hundred twenty".