242168915 has 4 divisors (see below), whose sum is σ = 290602704. Its totient is φ = 193735128.

The previous prime is 242168903. The next prime is 242168917. The reversal of 242168915 is 519861242.

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

It is a cyclic number.

It is not a de Polignac number, because 242168915 - 2⁸ = 242168659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242168917) 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, 24216887 + ... + 24216896.

It is an arithmetic number, because the mean of its divisors is an integer number (72650676).

Almost surely, 2^242168915 is an apocalyptic number.

242168915 is a deficient number, since it is larger than the sum of its proper divisors (48433789).

242168915 is an equidigital number, since it uses as much as digits as its factorization.

242168915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48433788.

The product of its digits is 34560, while the sum is 38.

The square root of 242168915 is about 15561.7773727810. Note that the first 3 decimals coincide. The cubic root of 242168915 is about 623.3129242716.

The spelling of 242168915 in words is "two hundred forty-two million, one hundred sixty-eight thousand, nine hundred fifteen".