256033351 has 4 divisors (see below), whose sum is σ = 292609552. Its totient is φ = 219457152.

The previous prime is 256033321. The next prime is 256033357. The reversal of 256033351 is 153330652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256033351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256033357) by changing a digit.

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, 18288090 + ... + 18288103.

It is an arithmetic number, because the mean of its divisors is an integer number (73152388).

Almost surely, 2^256033351 is an apocalyptic number.

256033351 is a deficient number, since it is larger than the sum of its proper divisors (36576201).

256033351 is an equidigital number, since it uses as much as digits as its factorization.

256033351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36576200.

The product of its (nonzero) digits is 8100, while the sum is 28.

The square root of 256033351 is about 16001.0421848078. The cubic root of 256033351 is about 634.9879932423.

The spelling of 256033351 in words is "two hundred fifty-six million, thirty-three thousand, three hundred fifty-one".