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130431 = 376211
BaseRepresentation
bin11111110101111111
320121220210
4133311333
513133211
62443503
71052160
oct376577
9217823
10130431
1189aa4
1263593
13474a2
1435767
15289a6
hex1fd7f

130431 has 8 divisors (see below), whose sum is σ = 198784. Its totient is φ = 74520.

The previous prime is 130423. The next prime is 130439. The reversal of 130431 is 134031.

130431 is nontrivially palindromic in base 2.

It is an interprime number because it is at equal distance from previous prime (130423) and next prime (130439).

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

It is not a de Polignac number, because 130431 - 23 = 130423 is a prime.

It is a super-2 number, since 2×1304312 = 34024491522, 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 (130439) 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, 3085 + ... + 3126.

It is an arithmetic number, because the mean of its divisors is an integer number (24848).

2130431 is an apocalyptic number.

130431 is a deficient number, since it is larger than the sum of its proper divisors (68353).

130431 is an equidigital number, since it uses as much as digits as its factorization.

130431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6221.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 130431 is about 361.1523224347. The cubic root of 130431 is about 50.7138919874.

Adding to 130431 its reverse (134031), we get a palindrome (264462).

Subtracting 130431 from its reverse (134031), we obtain a square (3600 = 602).

It can be divided in two parts, 130 and 431, that added together give a triangular number (561 = T33).

The spelling of 130431 in words is "one hundred thirty thousand, four hundred thirty-one".

Divisors: 1 3 7 21 6211 18633 43477 130431