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131294830 = 2513129483
BaseRepresentation
bin1111101001101…
…10011001101110
3100011001110122111
413310312121232
5232102413310
621010034234
73152662522
oct764663156
9304043574
10131294830
1168126827
1237b7897a
132127cc64
1413619d82
15b7d728a
hex7d3666e

131294830 has 8 divisors (see below), whose sum is σ = 236330712. Its totient is φ = 52517928.

The previous prime is 131294819. The next prime is 131294831. The reversal of 131294830 is 38492131.

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 = 131294792 and 131294801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131294831) 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, 6564732 + ... + 6564751.

It is an arithmetic number, because the mean of its divisors is an integer number (29541339).

Almost surely, 2131294830 is an apocalyptic number.

131294830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131294830 is a deficient number, since it is larger than the sum of its proper divisors (105035882).

131294830 is a wasteful number, since it uses less digits than its factorization.

131294830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13129490.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 131294830 is about 11458.3956119520. The cubic root of 131294830 is about 508.2560322003.

The spelling of 131294830 in words is "one hundred thirty-one million, two hundred ninety-four thousand, eight hundred thirty".

Divisors: 1 2 5 10 13129483 26258966 65647415 131294830