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13531202540 = 2253471949741
BaseRepresentation
bin11001001101000010…
…11100001111101100
31021221000100022100122
430212201130033230
5210202441440130
610114404344112
7656213216042
oct144641341754
937830308318
1013531202540
115814013819
1227576a5038
13137846022b
14925124392
15542dd02e5
hex32685c3ec

13531202540 has 24 divisors (see below), whose sum is σ = 28497429072. Its totient is φ = 5396880320.

The previous prime is 13531202533. The next prime is 13531202543. The reversal of 13531202540 is 4520213531.

It is a happy number.

13531202540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13531202543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 967931 + ... + 981810.

It is an arithmetic number, because the mean of its divisors is an integer number (1187392878).

Almost surely, 213531202540 is an apocalyptic number.

13531202540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13531202540 is an abundant number, since it is smaller than the sum of its proper divisors (14966226532).

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

13531202540 is a wasteful number, since it uses less digits than its factorization.

13531202540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950097 (or 1950095 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 13531202540 in words is "thirteen billion, five hundred thirty-one million, two hundred two thousand, five hundred forty".

Divisors: 1 2 4 5 10 20 347 694 1388 1735 3470 6940 1949741 3899482 7798964 9748705 19497410 38994820 676560127 1353120254 2706240508 3382800635 6765601270 13531202540