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13300831 = 23578297
BaseRepresentation
bin110010101111…
…010001011111
3221000202022101
4302233101133
511401111311
61153025531
7221024635
oct62572137
927022271
1013300831
117565125
1245552a7
1329a911b
141aa3355
15127aec1
hexcaf45f

13300831 has 4 divisors (see below), whose sum is σ = 13879152. Its totient is φ = 12722512.

The previous prime is 13300813. The next prime is 13300841. The reversal of 13300831 is 13800331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13300831 - 25 = 13300799 is a prime.

It is a super-2 number, since 2×133008312 = 353824210581122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13300799 and 13300808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13300811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289126 + ... + 289171.

It is an arithmetic number, because the mean of its divisors is an integer number (3469788).

Almost surely, 213300831 is an apocalyptic number.

13300831 is a deficient number, since it is larger than the sum of its proper divisors (578321).

13300831 is an equidigital number, since it uses as much as digits as its factorization.

13300831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578320.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 13300831 is about 3647.0304358478. The cubic root of 13300831 is about 236.9333846378.

Subtracting 13300831 from its reverse (13800331), we obtain a triangular number (499500 = T999).

The spelling of 13300831 in words is "thirteen million, three hundred thousand, eight hundred thirty-one".

Divisors: 1 23 578297 13300831