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13252831 = 127241433
BaseRepresentation
bin110010100011…
…100011011111
3220221022110121
4302203203133
511343042311
61152015411
7220434664
oct62434337
926838417
1013252831
117532059
124531567
132990317
141a8da6b
15126bb71
hexca38df

13252831 has 8 divisors (see below), whose sum is σ = 13443584. Its totient is φ = 13063680.

The previous prime is 13252829. The next prime is 13252847. The reversal of 13252831 is 13825231.

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 13252831 - 21 = 13252829 is a prime.

It is a super-2 number, since 2×132528312 = 351275059029122, 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 = 13252796 and 13252805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13252871) 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, 30391 + ... + 30823.

It is an arithmetic number, because the mean of its divisors is an integer number (1680448).

Almost surely, 213252831 is an apocalyptic number.

13252831 is a deficient number, since it is larger than the sum of its proper divisors (190753).

13252831 is a wasteful number, since it uses less digits than its factorization.

13252831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801.

The product of its digits is 1440, while the sum is 25.

The square root of 13252831 is about 3640.4437916276. The cubic root of 13252831 is about 236.6480262601.

The spelling of 13252831 in words is "thirteen million, two hundred fifty-two thousand, eight hundred thirty-one".

Divisors: 1 127 241 433 30607 54991 104353 13252831