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11831521369 = 192248327697
BaseRepresentation
bin10110000010011011…
…01011000001011001
31010112120002120010011
423001031223001121
5143212332140434
65234010321521
7566124162253
oct130115530131
933476076104
1011831521369
115021649138
1223624292a1
131167295b25
148034c2cd3
15493a90e64
hex2c136b059

11831521369 has 8 divisors (see below), whose sum is σ = 12455236640. Its totient is φ = 11207906496.

The previous prime is 11831521327. The next prime is 11831521397. The reversal of 11831521369 is 96312513811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11831521369 - 211 = 11831519321 is a prime.

It is a super-2 number, since 2×118315213692 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11831521309) 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, 413329 + ... + 441025.

It is an arithmetic number, because the mean of its divisors is an integer number (1556904580).

Almost surely, 211831521369 is an apocalyptic number.

11831521369 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11831521369 is a deficient number, since it is larger than the sum of its proper divisors (623715271).

11831521369 is a wasteful number, since it uses less digits than its factorization.

11831521369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50199.

The product of its digits is 38880, while the sum is 40.

The spelling of 11831521369 in words is "eleven billion, eight hundred thirty-one million, five hundred twenty-one thousand, three hundred sixty-nine".

Divisors: 1 19 22483 27697 427177 526243 622711651 11831521369