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11431 = 72371
BaseRepresentation
bin10110010100111
3120200101
42302213
5331211
6124531
745220
oct26247
916611
1011431
118652
126747
135284
144247
1535c1
hex2ca7

11431 has 8 divisors (see below), whose sum is σ = 13824. Its totient is φ = 9240.

The previous prime is 11423. The next prime is 11437. The reversal of 11431 is 13411.

Adding to 11431 its reverse (13411), we get a palindrome (24842).

It is a happy number.

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

It is not a de Polignac number, because 11431 - 23 = 11423 is a prime.

It is a super-2 number, since 2×114312 = 261335522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11437) 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, 126 + ... + 196.

It is an arithmetic number, because the mean of its divisors is an integer number (1728).

211431 is an apocalyptic number.

11431 is a deficient number, since it is larger than the sum of its proper divisors (2393).

11431 is an equidigital number, since it uses as much as digits as its factorization.

11431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101.

The product of its digits is 12, while the sum is 10.

The square root of 11431 is about 106.9158547644. The cubic root of 11431 is about 22.5265530137.

The spelling of 11431 in words is "eleven thousand, four hundred thirty-one".

Divisors: 1 7 23 71 161 497 1633 11431