256231042 has 8 divisors (see below), whose sum is σ = 385765632. Its totient is φ = 127642500.

The previous prime is 256231033. The next prime is 256231067. The reversal of 256231042 is 240132652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 256230998 and 256231016.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235834 + ... + 236917.

It is an arithmetic number, because the mean of its divisors is an integer number (48220704).

Almost surely, 2^256231042 is an apocalyptic number.

256231042 is a deficient number, since it is larger than the sum of its proper divisors (129534590).

256231042 is a wasteful number, since it uses less digits than its factorization.

256231042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473024.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 256231042 is about 16007.2184341940. The cubic root of 256231042 is about 635.1513822642.

Adding to 256231042 its reverse (240132652), we get a palindrome (496363694).

The spelling of 256231042 in words is "two hundred fifty-six million, two hundred thirty-one thousand, forty-two".