256133607 has 4 divisors (see below), whose sum is σ = 341511480. Its totient is φ = 170755736.

The previous prime is 256133561. The next prime is 256133609. The reversal of 256133607 is 706331652.

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-256133607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256133609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42688932 + ... + 42688937.

It is an arithmetic number, because the mean of its divisors is an integer number (85377870).

Almost surely, 2^256133607 is an apocalyptic number.

256133607 is a deficient number, since it is larger than the sum of its proper divisors (85377873).

256133607 is an equidigital number, since it uses as much as digits as its factorization.

256133607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85377872.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 256133607 is about 16004.1746741280. The cubic root of 256133607 is about 635.0708640199.

The spelling of 256133607 in words is "two hundred fifty-six million, one hundred thirty-three thousand, six hundred seven".