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2156523055 = 5431304611
BaseRepresentation
bin1000000010001001…
…1110111000101111
312120021212201111021
42000202132320233
513404032214210
6553553435011
7104304100141
oct20042367057
95507781437
102156523055
11a07334765
1250226ba67
13284a1b35b
141665a0c91
15c94cebda
hex8089ee2f

2156523055 has 4 divisors (see below), whose sum is σ = 2587827672. Its totient is φ = 1725218440.

The previous prime is 2156523053. The next prime is 2156523067. The reversal of 2156523055 is 5503256512.

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

It is not a de Polignac number, because 2156523055 - 21 = 2156523053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2156523055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156523053) 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, 215652301 + ... + 215652310.

It is an arithmetic number, because the mean of its divisors is an integer number (646956918).

Almost surely, 22156523055 is an apocalyptic number.

2156523055 is a deficient number, since it is larger than the sum of its proper divisors (431304617).

2156523055 is an equidigital number, since it uses as much as digits as its factorization.

2156523055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431304616.

The product of its (nonzero) digits is 45000, while the sum is 34.

The square root of 2156523055 is about 46438.3791168469. The cubic root of 2156523055 is about 1291.9668442178.

Adding to 2156523055 its reverse (5503256512), we get a palindrome (7659779567).

The spelling of 2156523055 in words is "two billion, one hundred fifty-six million, five hundred twenty-three thousand, fifty-five".

Divisors: 1 5 431304611 2156523055