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2015225280 = 263256111471
BaseRepresentation
bin111100000011101…
…1110010111000000
312012110000001101100
41320013132113000
513111344202110
6531545134400
7100640063235
oct17007362700
95173001340
102015225280
119445a6642
12482a8a400
132616783c3
141518dd78c
15bbdbdbc0
hex781de5c0

2015225280 has 168 divisors, whose sum is σ = 7045781184. Its totient is φ = 528537600.

The previous prime is 2015225207. The next prime is 2015225281. The reversal of 2015225280 is 825225102.

It is a super-2 number, since 2×20152252802 = 8122265858302156800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015225281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 169945 + ... + 181415.

Almost surely, 22015225280 is an apocalyptic number.

2015225280 is a gapful number since it is divisible by the number (20) 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 2015225280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3522890592).

2015225280 is an abundant number, since it is smaller than the sum of its proper divisors (5030555904).

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

2015225280 is a wasteful number, since it uses less digits than its factorization.

2015225280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11555 (or 11542 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 2015225280 is about 44891.2606194123. The cubic root of 2015225280 is about 1263.1100796813.

The spelling of 2015225280 in words is "two billion, fifteen million, two hundred twenty-five thousand, two hundred eighty".