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12353431 = 131181521
BaseRepresentation
bin101111000111…
…111110010111
3212020121201111
4233013332113
511130302211
61120435451
7210000556
oct57077627
925217644
1012353431
116a78352
124178b87
132736b2c
1418d7d9d
151140421
hexbc7f97

12353431 has 8 divisors (see below), whose sum is σ = 12540528. Its totient is φ = 12168000.

The previous prime is 12353389. The next prime is 12353437. The reversal of 12353431 is 13435321.

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 12353431 - 29 = 12352919 is a prime.

It is a super-2 number, since 2×123534312 = 305214514943522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12353437) 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, 23451 + ... + 23971.

It is an arithmetic number, because the mean of its divisors is an integer number (1567566).

Almost surely, 212353431 is an apocalyptic number.

12353431 is a deficient number, since it is larger than the sum of its proper divisors (187097).

12353431 is a wasteful number, since it uses less digits than its factorization.

12353431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833.

The product of its digits is 1080, while the sum is 22.

The square root of 12353431 is about 3514.7447987016. The cubic root of 12353431 is about 231.1687890145.

Adding to 12353431 its reverse (13435321), we get a palindrome (25788752).

The spelling of 12353431 in words is "twelve million, three hundred fifty-three thousand, four hundred thirty-one".

Divisors: 1 131 181 521 23711 68251 94301 12353431