256042237 has 8 divisors (see below), whose sum is σ = 288329472. Its totient is φ = 225256800.

The previous prime is 256042223. The next prime is 256042243. The reversal of 256042237 is 732240652.

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

It is a cyclic number.

It is not a de Polignac number, because 256042237 - 2¹⁵ = 256009469 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256042199 and 256042208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256042207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375088 + ... + 375769.

It is an arithmetic number, because the mean of its divisors is an integer number (36041184).

Almost surely, 2^256042237 is an apocalyptic number.

It is an amenable number.

256042237 is a deficient number, since it is larger than the sum of its proper divisors (32287235).

256042237 is a wasteful number, since it uses less digits than its factorization.

256042237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750899.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 256042237 is about 16001.3198518122. The cubic root of 256042237 is about 634.9953392098.

Adding to 256042237 its reverse (732240652), we get a palindrome (988282889).

The spelling of 256042237 in words is "two hundred fifty-six million, forty-two thousand, two hundred thirty-seven".