256630033 has 8 divisors (see below), whose sum is σ = 284139360. Its totient is φ = 229817280.

The previous prime is 256630009. The next prime is 256630051. The reversal of 256630033 is 330036652.

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

It is a de Polignac number, because none of the positive numbers 2^k-256630033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256629983 and 256630010.

It is not an unprimeable number, because it can be changed into a prime (256630333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173368 + ... + 174841.

It is an arithmetic number, because the mean of its divisors is an integer number (35517420).

Almost surely, 2^256630033 is an apocalyptic number.

It is an amenable number.

256630033 is a deficient number, since it is larger than the sum of its proper divisors (27509327).

256630033 is a wasteful number, since it uses less digits than its factorization.

256630033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348287.

The product of its (nonzero) digits is 9720, while the sum is 28.

The square root of 256630033 is about 16019.6764324377. The cubic root of 256630033 is about 635.4808873066.

Adding to 256630033 its reverse (330036652), we get a palindrome (586666685).

The spelling of 256630033 in words is "two hundred fifty-six million, six hundred thirty thousand, thirty-three".