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131210315 = 5191137393
BaseRepresentation
bin1111101001000…
…01110001001011
3100010220011201022
413310201301023
5232042212230
621004143055
73152161235
oct764416113
9303804638
10131210315
1168079285
1237b37a8b
1321250652
14135d7255
15b7bc1e5
hex7d21c4b

131210315 has 8 divisors (see below), whose sum is σ = 158277888. Its totient is φ = 104417920.

The previous prime is 131210309. The next prime is 131210357. The reversal of 131210315 is 513012131.

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

It is not a de Polignac number, because 131210315 - 212 = 131206219 is a prime.

It is a super-2 number, since 2×1312103152 = 34432293524798450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131210293 and 131210302.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67742 + ... + 69651.

It is an arithmetic number, because the mean of its divisors is an integer number (19784736).

Almost surely, 2131210315 is an apocalyptic number.

131210315 is a deficient number, since it is larger than the sum of its proper divisors (27067573).

131210315 is a wasteful number, since it uses less digits than its factorization.

131210315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137589.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 131210315 is about 11454.7071110526. The cubic root of 131210315 is about 508.1469533212.

Adding to 131210315 its reverse (513012131), we get a palindrome (644222446).

The spelling of 131210315 in words is "one hundred thirty-one million, two hundred ten thousand, three hundred fifteen".

Divisors: 1 5 191 955 137393 686965 26242063 131210315