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2215007380 = 225234147309
BaseRepresentation
bin1000010000000110…
…0101010010010100
312201100221000220101
42010001211102110
514014020214010
61003443143444
7105614152315
oct20401452224
95640830811
102215007380
11a3734a913
12519974b84
13293b87471
1417026660c
15ce6d373a
hex84065494

2215007380 has 24 divisors (see below), whose sum is σ = 4653600840. Its totient is φ = 885605760.

The previous prime is 2215007363. The next prime is 2215007393. The reversal of 2215007380 is 837005122.

It can be written as a sum of positive squares in 4 ways, for example, as 70761744 + 2144245636 = 8412^2 + 46306^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23166 + ... + 70474.

It is an arithmetic number, because the mean of its divisors is an integer number (193900035).

Almost surely, 22215007380 is an apocalyptic number.

2215007380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2215007380 is an abundant number, since it is smaller than the sum of its proper divisors (2438593460).

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

2215007380 is a wasteful number, since it uses less digits than its factorization.

2215007380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49659 (or 49657 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 2215007380 is about 47063.8649071663. The cubic root of 2215007380 is about 1303.5420916269.

The spelling of 2215007380 in words is "two billion, two hundred fifteen million, seven thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 2341 4682 9364 11705 23410 46820 47309 94618 189236 236545 473090 946180 110750369 221500738 443001476 553751845 1107503690 2215007380