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1313512180 = 225193456611
BaseRepresentation
bin100111001001010…
…1001101011110100
310101112121022222021
41032102221223310
510142224342210
6334201042524
744356445401
oct11622515364
93345538867
101313512180
11614497162
12307a86444
1317c189356
14c663b2a8
157a4adbda
hex4e4a9af4

1313512180 has 24 divisors (see below), whose sum is σ = 2903554080. Its totient is φ = 497751840.

The previous prime is 1313512163. The next prime is 1313512181. The reversal of 1313512180 is 812153131.

It is a super-3 number, since 3×13135121803 (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313512181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1727926 + ... + 1728685.

It is an arithmetic number, because the mean of its divisors is an integer number (120981420).

Almost surely, 21313512180 is an apocalyptic number.

1313512180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313512180 is an abundant number, since it is smaller than the sum of its proper divisors (1590041900).

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

1313512180 is a wasteful number, since it uses less digits than its factorization.

1313512180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3456639 (or 3456637 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 1313512180 is about 36242.4085844194. The cubic root of 1313512180 is about 1095.1611641880.

The spelling of 1313512180 in words is "one billion, three hundred thirteen million, five hundred twelve thousand, one hundred eighty".

Divisors: 1 2 4 5 10 19 20 38 76 95 190 380 3456611 6913222 13826444 17283055 34566110 65675609 69132220 131351218 262702436 328378045 656756090 1313512180