242942217 has 16 divisors (see below), whose sum is σ = 378808320. Its totient is φ = 135595152.

The previous prime is 242942197. The next prime is 242942233. The reversal of 242942217 is 712249242.

It is not a de Polignac number, because 242942217 - 2⁶ = 242942153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242942017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133617 + ... + 135422.

It is an arithmetic number, because the mean of its divisors is an integer number (23675520).

Almost surely, 2^242942217 is an apocalyptic number.

It is an amenable number.

242942217 is a deficient number, since it is larger than the sum of its proper divisors (135866103).

242942217 is a wasteful number, since it uses less digits than its factorization.

242942217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269092.

The product of its digits is 16128, while the sum is 33.

The square root of 242942217 is about 15586.6037673382. The cubic root of 242942217 is about 623.9756806556.

The spelling of 242942217 in words is "two hundred forty-two million, nine hundred forty-two thousand, two hundred seventeen".