It is a happy number.
256216242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a sphenic number, since it is the product of 3 distinct primes.
256216242 is an admirable number.
Almost surely, 2256216242 is an apocalyptic number.
256216242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
256216242 is a wasteful number, since it uses less digits than its factorization.
256216242 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 42702712.
The square root of 256216242 is about 16006.7561360820. The cubic root of 256216242 is about 635.1391531689.
Adding to 256216242 its reverse (242612652), we get a palindrome (498828894).
The spelling of 256216242 in words is "two hundred fifty-six million, two hundred sixteen thousand, two hundred forty-two".