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13430311 = 19967489
BaseRepresentation
bin110011001110…
…111000100111
3221021022220221
4303032320213
511414232221
61155505211
7222104266
oct63167047
927238827
1013430311
117643434
1245b8207
132a2303b
1512a4541
hexccee27

13430311 has 4 divisors (see below), whose sum is σ = 13498000. Its totient is φ = 13362624.

The previous prime is 13430303. The next prime is 13430369. The reversal of 13430311 is 11303431.

13430311 = T34 + T35 + ... + T431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11303431 = 19358567.

It is a cyclic number.

It is not a de Polignac number, because 13430311 - 23 = 13430303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13439311) 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, 33546 + ... + 33943.

It is an arithmetic number, because the mean of its divisors is an integer number (3374500).

Almost surely, 213430311 is an apocalyptic number.

13430311 is a deficient number, since it is larger than the sum of its proper divisors (67689).

13430311 is an equidigital number, since it uses as much as digits as its factorization.

13430311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67688.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 13430311 is about 3664.7388720071. The cubic root of 13430311 is about 237.6997307846.

Adding to 13430311 its reverse (11303431), we get a palindrome (24733742).

The spelling of 13430311 in words is "thirteen million, four hundred thirty thousand, three hundred eleven".

Divisors: 1 199 67489 13430311