256242633 has 16 divisors (see below), whose sum is σ = 350887680. Its totient is φ = 166242384.

The previous prime is 256242631. The next prime is 256242643. The reversal of 256242633 is 336242652.

It is not a de Polignac number, because 256242633 - 2¹ = 256242631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256242594 and 256242603.

It is not an unprimeable number, because it can be changed into a prime (256242631) 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 15 ways as a sum of consecutive naturals, for example, 32998 + ... + 40016.

It is an arithmetic number, because the mean of its divisors is an integer number (21930480).

Almost surely, 2^256242633 is an apocalyptic number.

It is an amenable number.

256242633 is a deficient number, since it is larger than the sum of its proper divisors (94645047).

256242633 is a wasteful number, since it uses less digits than its factorization.

256242633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7348.

The product of its digits is 51840, while the sum is 33.

The square root of 256242633 is about 16007.5804855075. The cubic root of 256242633 is about 635.1609594653.

The spelling of 256242633 in words is "two hundred fifty-six million, two hundred forty-two thousand, six hundred thirty-three".