242246155257 has 12 divisors (see below), whose sum is σ = 353842699860. Its totient is φ = 159682858368.

The previous prime is 242246155247. The next prime is 242246155313. The reversal of 242246155257 is 752551642242.

242246155257 is a `hidden beast` number, since 2 + 4 + 2 + 2 + 4 + 615 + 5 + 25 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 138187653696 + 104058501561 = 371736^2 + 322581^2 .

It is not a de Polignac number, because 242246155257 - 2¹⁴ = 242246138873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242246155247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151214028 + ... + 151215629.

It is an arithmetic number, because the mean of its divisors is an integer number (29486891655).

Almost surely, 2^242246155257 is an apocalyptic number.

It is an amenable number.

242246155257 is a deficient number, since it is larger than the sum of its proper divisors (111596544603).

242246155257 is a wasteful number, since it uses less digits than its factorization.

242246155257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302429752 (or 302429749 counting only the distinct ones).

The product of its digits is 1344000, while the sum is 45.

Adding to 242246155257 its reverse (752551642242), we get a palindrome (994797797499).

The spelling of 242246155257 in words is "two hundred forty-two billion, two hundred forty-six million, one hundred fifty-five thousand, two hundred fifty-seven".