242086217 has 4 divisors (see below), whose sum is σ = 242369556. Its totient is φ = 241802880.

The previous prime is 242086199. The next prime is 242086219. The reversal of 242086217 is 712680242.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97990201 + 144096016 = 9899^2 + 12004^2 .

It is a cyclic number.

It is not a de Polignac number, because 242086217 - 2¹⁸ = 241824073 is a prime.

It is a super-2 number, since 2×242086217² = 117211472922742178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242086219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140384 + ... + 142097.

It is an arithmetic number, because the mean of its divisors is an integer number (60592389).

Almost surely, 2^242086217 is an apocalyptic number.

It is an amenable number.

242086217 is a deficient number, since it is larger than the sum of its proper divisors (283339).

242086217 is an equidigital number, since it uses as much as digits as its factorization.

242086217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283338.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 242086217 is about 15559.1200586666. The cubic root of 242086217 is about 623.2419647090.

The spelling of 242086217 in words is "two hundred forty-two million, eighty-six thousand, two hundred seventeen".