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340231 = 3131087
BaseRepresentation
bin1010011000100000111
3122021201011
41103010013
541341411
611143051
72614633
oct1230407
9567634
10340231
11212691
12144a87
13bbb28
148bdc3
156ac21
hex53107

340231 has 4 divisors (see below), whose sum is σ = 341632. Its totient is φ = 338832.

The previous prime is 340211. The next prime is 340237. The reversal of 340231 is 132043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132043 = 235741.

It is a cyclic number.

It is not a de Polignac number, because 340231 - 27 = 340103 is a prime.

It is a super-2 number, since 2×3402312 = 231514266722, which contains 22 as substring.

It is a Duffinian number.

340231 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 340231.

It is not an unprimeable number, because it can be changed into a prime (340237) 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, 231 + ... + 856.

It is an arithmetic number, because the mean of its divisors is an integer number (85408).

2340231 is an apocalyptic number.

340231 is a deficient number, since it is larger than the sum of its proper divisors (1401).

340231 is a wasteful number, since it uses less digits than its factorization.

340231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 340231 is about 583.2932367172. The cubic root of 340231 is about 69.8111234780.

Adding to 340231 its reverse (132043), we get a palindrome (472274).

The spelling of 340231 in words is "three hundred forty thousand, two hundred thirty-one".

Divisors: 1 313 1087 340231