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131631432761 is a prime number
BaseRepresentation
bin111101010010111011…
…0000100010000111001
3110120202121202121122102
41322211312010100321
54124040121322021
6140245354233145
712336643501043
oct1724566042071
9416677677572
10131631432761
115090856a774
12216171257b5
13c549b9476a
14652a022a93
1536561c100b
hex1ea5d84439

131631432761 has 2 divisors, whose sum is σ = 131631432762. Its totient is φ = 131631432760.

The previous prime is 131631432739. The next prime is 131631432809. The reversal of 131631432761 is 167234136131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130375155625 + 1256277136 = 361075^2 + 35444^2 .

It is a cyclic number.

It is not a de Polignac number, because 131631432761 - 26 = 131631432697 is a prime.

It is not a weakly prime, because it can be changed into another prime (131631434761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65815716380 + 65815716381.

It is an arithmetic number, because the mean of its divisors is an integer number (65815716381).

Almost surely, 2131631432761 is an apocalyptic number.

It is an amenable number.

131631432761 is a deficient number, since it is larger than the sum of its proper divisors (1).

131631432761 is an equidigital number, since it uses as much as digits as its factorization.

131631432761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

Adding to 131631432761 its reverse (167234136131), we get a palindrome (298865568892).

The spelling of 131631432761 in words is "one hundred thirty-one billion, six hundred thirty-one million, four hundred thirty-two thousand, seven hundred sixty-one".