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131130031031 = 2331183913087
BaseRepresentation
bin111101000011111110…
…1010111101110110111
3110112110200021202202222
41322013331113232313
54122023241443111
6140123523352555
712321344605316
oct1720775275667
9415420252688
10131130031031
115068053617a
12214b722275b
13c49a03b64c
1464bd5c427d
15362717c7db
hex1e87f57bb7

131130031031 has 8 divisors (see below), whose sum is σ = 141245251584. Its totient is φ = 121382636760.

The previous prime is 131130031009. The next prime is 131130031049. The reversal of 131130031031 is 130130031131.

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

It is a cyclic number.

It is not a de Polignac number, because 131130031031 - 210 = 131130030007 is a prime.

It is a super-2 number, since 2×1311300310312 (a number of 23 digits) 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 (131130031051) 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, 91955831 + ... + 91957256.

It is an arithmetic number, because the mean of its divisors is an integer number (17655656448).

Almost surely, 2131130031031 is an apocalyptic number.

131130031031 is a deficient number, since it is larger than the sum of its proper divisors (10115220553).

131130031031 is a wasteful number, since it uses less digits than its factorization.

131130031031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183913141.

The product of its (nonzero) digits is 81, while the sum is 17.

Adding to 131130031031 its reverse (130130031131), we get a palindrome (261260062162).

The spelling of 131130031031 in words is "one hundred thirty-one billion, one hundred thirty million, thirty-one thousand, thirty-one".

Divisors: 1 23 31 713 183913087 4230001001 5701305697 131130031031