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2151021143 = 21110194413
BaseRepresentation
bin1000000000110101…
…1111101001010111
312112220112012021202
42000031133221113
513401130134033
6553235503115
7104206243445
oct20015375127
95486465252
102151021143
11a04217027
12500457a9b
13283842c9b
1416596bb95
15c8c948e8
hex8035fa57

2151021143 has 4 divisors (see below), whose sum is σ = 2161215768. Its totient is φ = 2140826520.

The previous prime is 2151021113. The next prime is 2151021161. The reversal of 2151021143 is 3411201512.

2151021143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2151021143 - 26 = 2151021079 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 (2151021113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5096996 + ... + 5097417.

It is an arithmetic number, because the mean of its divisors is an integer number (540303942).

Almost surely, 22151021143 is an apocalyptic number.

2151021143 is a deficient number, since it is larger than the sum of its proper divisors (10194625).

2151021143 is a wasteful number, since it uses less digits than its factorization.

2151021143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10194624.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2151021143 is about 46379.1024384905. The cubic root of 2151021143 is about 1290.8671818783.

Adding to 2151021143 its reverse (3411201512), we get a palindrome (5562222655).

The spelling of 2151021143 in words is "two billion, one hundred fifty-one million, twenty-one thousand, one hundred forty-three".

Divisors: 1 211 10194413 2151021143