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2159148287 = 3153168477
BaseRepresentation
bin1000000010110001…
…1111110011111111
312120110211002122002
42000230133303333
513410220221122
6554130012515
7104335312652
oct20054376377
95513732562
102159148287
11a0886807a
1250311713b
1328542a24a
14166a85899
15c984c992
hex80b1fcff

2159148287 has 4 divisors (see below), whose sum is σ = 2159248296. Its totient is φ = 2159048280.

The previous prime is 2159148263. The next prime is 2159148331. The reversal of 2159148287 is 7828419512.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2159148287 - 28 = 2159148031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159148487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2708 + ... + 65769.

It is an arithmetic number, because the mean of its divisors is an integer number (539812074).

Almost surely, 22159148287 is an apocalyptic number.

2159148287 is a deficient number, since it is larger than the sum of its proper divisors (100009).

2159148287 is an equidigital number, since it uses as much as digits as its factorization.

2159148287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100008.

The product of its digits is 322560, while the sum is 47.

The square root of 2159148287 is about 46466.6362780867. The cubic root of 2159148287 is about 1292.4908879758.

The spelling of 2159148287 in words is "two billion, one hundred fifty-nine million, one hundred forty-eight thousand, two hundred eighty-seven".

Divisors: 1 31531 68477 2159148287