242240247 has 16 divisors (see below), whose sum is σ = 362054880. Its totient is φ = 160062336.

The previous prime is 242240239. The next prime is 242240261. The reversal of 242240247 is 742042242.

It is not a de Polignac number, because 242240247 - 2³ = 242240239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 242240247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242240227) 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, 36648 + ... + 42749.

It is an arithmetic number, because the mean of its divisors is an integer number (22628430).

Almost surely, 2^242240247 is an apocalyptic number.

242240247 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

242240247 is a deficient number, since it is larger than the sum of its proper divisors (119814633).

242240247 is a wasteful number, since it uses less digits than its factorization.

242240247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79519 (or 79513 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 27.

The square root of 242240247 is about 15564.0691016199. The cubic root of 242240247 is about 623.3741181876.

Adding to 242240247 its reverse (742042242), we get a palindrome (984282489).

The spelling of 242240247 in words is "two hundred forty-two million, two hundred forty thousand, two hundred forty-seven".