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13131012 = 22310910039
BaseRepresentation
bin110010000101…
…110100000100
3220201010100210
4302011310010
511330143022
61145235420
7216416556
oct62056404
926633323
1013131012
117459584
124492b70
132949a3b
141a5b4d6
151245a0c
hexc85d04

13131012 has 24 divisors (see below), whose sum is σ = 30923200. Its totient is φ = 4336416.

The previous prime is 13130989. The next prime is 13131017. The reversal of 13131012 is 21013131.

It is a super-2 number, since 2×131310122 = 344846952288288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (13131017) 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, 3712 + ... + 6327.

Almost surely, 213131012 is an apocalyptic number.

13131012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13131012 is an abundant number, since it is smaller than the sum of its proper divisors (17792188).

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

13131012 is a wasteful number, since it uses less digits than its factorization.

13131012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10155 (or 10153 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 13131012 is about 3623.6738263812. The cubic root of 13131012 is about 235.9207097418.

Adding to 13131012 its reverse (21013131), we get a palindrome (34144143).

The spelling of 13131012 in words is "thirteen million, one hundred thirty-one thousand, twelve".

Divisors: 1 2 3 4 6 12 109 218 327 436 654 1308 10039 20078 30117 40156 60234 120468 1094251 2188502 3282753 4377004 6565506 13131012