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2131301205 = 3251129148471
BaseRepresentation
bin111111100001001…
…0001001101010101
312111112102022121200
41333002101031111
513331103114310
6551253103113
7103546522065
oct17702211525
95445368550
102131301205
119a4078160
124b5927a99
1327c72a197
141630b73a5
15c719b9c0
hex7f091355

2131301205 has 48 divisors (see below), whose sum is σ = 4169093760. Its totient is φ = 997718400.

The previous prime is 2131301177. The next prime is 2131301213. The reversal of 2131301205 is 5021031312.

It is not a de Polignac number, because 2131301205 - 216 = 2131235669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59881 + ... + 88590.

It is an arithmetic number, because the mean of its divisors is an integer number (86856120).

Almost surely, 22131301205 is an apocalyptic number.

It is an amenable number.

2131301205 is a deficient number, since it is larger than the sum of its proper divisors (2037792555).

2131301205 is a wasteful number, since it uses less digits than its factorization.

2131301205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148522 (or 148519 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2131301205 is about 46166.0178594602. The cubic root of 2131301205 is about 1286.9102999663.

Adding to 2131301205 its reverse (5021031312), we get a palindrome (7152332517).

The spelling of 2131301205 in words is "two billion, one hundred thirty-one million, three hundred one thousand, two hundred five".

Divisors: 1 3 5 9 11 15 29 33 45 55 87 99 145 165 261 319 435 495 957 1305 1595 2871 4785 14355 148471 445413 742355 1336239 1633181 2227065 4305659 4899543 6681195 8165905 12916977 14698629 21528295 24497715 38750931 47362249 64584885 73493145 142086747 193754655 236811245 426260241 710433735 2131301205