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216131117 is a prime number
BaseRepresentation
bin11001110000111…
…10011000101101
3120001200121011012
430320132120231
5420312143432
633240235005
75233040606
oct1470363055
9501617135
10216131117
11101000564
126046ba65
1335a14747
14209c0dad
1513e93cb2
hexce1e62d

216131117 has 2 divisors, whose sum is σ = 216131118. Its totient is φ = 216131116.

The previous prime is 216131107. The next prime is 216131143. The reversal of 216131117 is 711131612.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168714121 + 47416996 = 12989^2 + 6886^2 .

It is a cyclic number.

It is not a de Polignac number, because 216131117 - 26 = 216131053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216131092 and 216131101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216131107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108065558 + 108065559.

It is an arithmetic number, because the mean of its divisors is an integer number (108065559).

Almost surely, 2216131117 is an apocalyptic number.

It is an amenable number.

216131117 is a deficient number, since it is larger than the sum of its proper divisors (1).

216131117 is an equidigital number, since it uses as much as digits as its factorization.

216131117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 252, while the sum is 23.

The square root of 216131117 is about 14701.3984708938. The cubic root of 216131117 is about 600.1213800728.

Adding to 216131117 its reverse (711131612), we get a palindrome (927262729).

The spelling of 216131117 in words is "two hundred sixteen million, one hundred thirty-one thousand, one hundred seventeen".