255240242 has 4 divisors (see below), whose sum is σ = 382860366. Its totient is φ = 127620120.

The previous prime is 255240241. The next prime is 255240257. The reversal of 255240242 is 242042552.

255240242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 147889921 + 107350321 = 12161^2 + 10361^2 .

It is a super-2 number, since 2×255240242² = 130295162272437128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (255240241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63810059 + ... + 63810062.

Almost surely, 2^255240242 is an apocalyptic number.

255240242 is a deficient number, since it is larger than the sum of its proper divisors (127620124).

255240242 is a wasteful number, since it uses less digits than its factorization.

255240242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127620123.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 255240242 is about 15976.2399205821. The cubic root of 255240242 is about 634.3316521846.

Adding to 255240242 its reverse (242042552), we get a palindrome (497282794).

The spelling of 255240242 in words is "two hundred fifty-five million, two hundred forty thousand, two hundred forty-two".