242015317 has 2 divisors, whose sum is σ = 242015318. Its totient is φ = 242015316.

The previous prime is 242015299. The next prime is 242015329. The reversal of 242015317 is 713510242.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148815601 + 93199716 = 12199^2 + 9654^2 .

It is a cyclic number.

It is not a de Polignac number, because 242015317 - 2²⁷ = 107797589 is a prime.

It is a super-2 number, since 2×242015317² = 117142827325220978, which contains 22 as substring.

It is equal to p_13266061 and since 242015317 and 13266061 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 242015291 and 242015300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242015387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121007658 + 121007659.

It is an arithmetic number, because the mean of its divisors is an integer number (121007659).

Almost surely, 2^242015317 is an apocalyptic number.

It is an amenable number.

242015317 is a deficient number, since it is larger than the sum of its proper divisors (1).

242015317 is an equidigital number, since it uses as much as digits as its factorization.

242015317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 242015317 is about 15556.8414853401. The cubic root of 242015317 is about 623.1811156304.

Adding to 242015317 its reverse (713510242), we get a palindrome (955525559).

The spelling of 242015317 in words is "two hundred forty-two million, fifteen thousand, three hundred seventeen".