201142517 has 2 divisors, whose sum is σ = 201142518. Its totient is φ = 201142516.

The previous prime is 201142511. The next prime is 201142541. The reversal of 201142517 is 715241102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183494116 + 17648401 = 13546^2 + 4201^2 .

It is a cyclic number.

It is not a de Polignac number, because 201142517 - 2²⁰ = 200093941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201142492 and 201142501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201142511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100571258 + 100571259.

It is an arithmetic number, because the mean of its divisors is an integer number (100571259).

Almost surely, 2^201142517 is an apocalyptic number.

It is an amenable number.

201142517 is a deficient number, since it is larger than the sum of its proper divisors (1).

201142517 is an equidigital number, since it uses as much as digits as its factorization.

201142517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 201142517 is about 14182.4721751886. The cubic root of 201142517 is about 585.9150138647.

Adding to 201142517 its reverse (715241102), we get a palindrome (916383619).

The spelling of 201142517 in words is "two hundred one million, one hundred forty-two thousand, five hundred seventeen".