255311242 has 4 divisors (see below), whose sum is σ = 382966866. Its totient is φ = 127655620.

The previous prime is 255311239. The next prime is 255311263. The reversal of 255311242 is 242113552.

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., 193515921 + 61795321 = 13911^2 + 7861^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63827809 + ... + 63827812.

Almost surely, 2^255311242 is an apocalyptic number.

255311242 is a deficient number, since it is larger than the sum of its proper divisors (127655624).

255311242 is a wasteful number, since it uses less digits than its factorization.

255311242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127655623.

The product of its digits is 2400, while the sum is 25.

The square root of 255311242 is about 15978.4618158320. The cubic root of 255311242 is about 634.3904639294.

Adding to 255311242 its reverse (242113552), we get a palindrome (497424794).

The spelling of 255311242 in words is "two hundred fifty-five million, three hundred eleven thousand, two hundred forty-two".