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5551780 = 22513131163
BaseRepresentation
bin10101001011011010100100
3101110001121111
4111023122210
52410124110
6314554404
765121643
oct25133244
911401544
105551780
113152153
121a38a04
1311c4ca0
14a4735a
15749e8a
hex54b6a4

5551780 has 48 divisors (see below), whose sum is σ = 12729024. Its totient is φ = 2021760.

The previous prime is 5551757. The next prime is 5551783. The reversal of 5551780 is 871555.

It is a super-2 number, since 2×55517802 = 61644522336800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5551783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33979 + ... + 34141.

It is an arithmetic number, because the mean of its divisors is an integer number (265188).

Almost surely, 25551780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5551780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6364512).

5551780 is an abundant number, since it is smaller than the sum of its proper divisors (7177244).

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

5551780 is a wasteful number, since it uses less digits than its factorization.

5551780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 31.

The square root of 5551780 is about 2356.2215515524. The cubic root of 5551780 is about 177.0696311736.

The spelling of 5551780 in words is "five million, five hundred fifty-one thousand, seven hundred eighty".

Divisors: 1 2 4 5 10 13 20 26 52 65 130 131 163 260 262 326 524 652 655 815 1310 1630 1703 2119 2620 3260 3406 4238 6812 8476 8515 10595 17030 21190 21353 34060 42380 42706 85412 106765 213530 277589 427060 555178 1110356 1387945 2775890 5551780