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131234230 = 2513123423
BaseRepresentation
bin1111101001001…
…11100110110110
3100010221101112001
413310213212312
5232043443410
621004445514
73152321041
oct764474666
9303841461
10131234230
1168095246
1237b4989a
132125b4ba
1413601c58
15b7c433a
hex7d279b6

131234230 has 8 divisors (see below), whose sum is σ = 236221632. Its totient is φ = 52493688.

The previous prime is 131234219. The next prime is 131234239. The reversal of 131234230 is 32432131.

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

It is a junction number, because it is equal to n+sod(n) for n = 131234198 and 131234207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131234239) 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 3 ways as a sum of consecutive naturals, for example, 6561702 + ... + 6561721.

It is an arithmetic number, because the mean of its divisors is an integer number (29527704).

Almost surely, 2131234230 is an apocalyptic number.

131234230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131234230 is a deficient number, since it is larger than the sum of its proper divisors (104987402).

131234230 is a wasteful number, since it uses less digits than its factorization.

131234230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13123430.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 131234230 is about 11455.7509574886. The cubic root of 131234230 is about 508.1778238518.

Adding to 131234230 its reverse (32432131), we get a palindrome (163666361).

The spelling of 131234230 in words is "one hundred thirty-one million, two hundred thirty-four thousand, two hundred thirty".

Divisors: 1 2 5 10 13123423 26246846 65617115 131234230