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131031141 = 33110313679
BaseRepresentation
bin1111100111101…
…10000001100101
3100010120001221020
413303312001211
5232020444031
621000241353
73150513663
oct763660145
9303501836
10131031141
1167a666aa
1237a70259
13211b9c27
141358bc33
15b784096
hex7cf6065

131031141 has 16 divisors (see below), whose sum is σ = 182108160. Its totient is φ = 83709360.

The previous prime is 131031137. The next prime is 131031167. The reversal of 131031141 is 141130131.

It is not a de Polignac number, because 131031141 - 22 = 131031137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131031141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131031181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2740 + ... + 16418.

It is an arithmetic number, because the mean of its divisors is an integer number (11381760).

Almost surely, 2131031141 is an apocalyptic number.

It is an amenable number.

131031141 is a deficient number, since it is larger than the sum of its proper divisors (51077019).

131031141 is a wasteful number, since it uses less digits than its factorization.

131031141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13816.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 131031141 is about 11446.8834623228. The cubic root of 131031141 is about 507.9155482507.

Adding to 131031141 its reverse (141130131), we get a palindrome (272161272).

The spelling of 131031141 in words is "one hundred thirty-one million, thirty-one thousand, one hundred forty-one".

Divisors: 1 3 31 93 103 309 3193 9579 13679 41037 424049 1272147 1408937 4226811 43677047 131031141