242240051 has 4 divisors (see below), whose sum is σ = 246810672. Its totient is φ = 237669432.

The previous prime is 242240039. The next prime is 242240059. The reversal of 242240051 is 150042242.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242240051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242240059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2285231 + ... + 2285336.

It is an arithmetic number, because the mean of its divisors is an integer number (61702668).

Almost surely, 2^242240051 is an apocalyptic number.

242240051 is a deficient number, since it is larger than the sum of its proper divisors (4570621).

242240051 is an equidigital number, since it uses as much as digits as its factorization.

242240051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4570620.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 242240051 is about 15564.0628050647. The cubic root of 242240051 is about 623.3739500607.

Adding to 242240051 its reverse (150042242), we get a palindrome (392282293).

The spelling of 242240051 in words is "two hundred forty-two million, two hundred forty thousand, fifty-one".