255312442 has 48 divisors (see below), whose sum is σ = 489311712. Its totient is φ = 98794080.

The previous prime is 255312419. The next prime is 255312493. The reversal of 255312442 is 244213552.

It is a self number, because there is not a number n which added to its sum of digits gives 255312442.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174988 + ... + 176440.

It is an arithmetic number, because the mean of its divisors is an integer number (10193994).

Almost surely, 2^255312442 is an apocalyptic number.

255312442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

255312442 is a deficient number, since it is larger than the sum of its proper divisors (233999270).

255312442 is a wasteful number, since it uses less digits than its factorization.

255312442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643 (or 1636 counting only the distinct ones).

The product of its digits is 9600, while the sum is 28.

The square root of 255312442 is about 15978.4993663360. The cubic root of 255312442 is about 634.3914578370.

Adding to 255312442 its reverse (244213552), we get a palindrome (499525994).

The spelling of 255312442 in words is "two hundred fifty-five million, three hundred twelve thousand, four hundred forty-two".