256667153 has 4 divisors (see below), whose sum is σ = 256699248. Its totient is φ = 256635060.

The previous prime is 256667149. The next prime is 256667179. The reversal of 256667153 is 351766652.

256667153 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 256667153 - 2² = 256667149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256667153.

It is not an unprimeable number, because it can be changed into a prime (256667053) 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, 6650 + ... + 23612.

It is an arithmetic number, because the mean of its divisors is an integer number (64174812).

Almost surely, 2^256667153 is an apocalyptic number.

It is an amenable number.

256667153 is a deficient number, since it is larger than the sum of its proper divisors (32095).

256667153 is a wasteful number, since it uses less digits than its factorization.

256667153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32094.

The product of its digits is 226800, while the sum is 41.

The square root of 256667153 is about 16020.8349657563. The cubic root of 256667153 is about 635.5115253331.

The spelling of 256667153 in words is "two hundred fifty-six million, six hundred sixty-seven thousand, one hundred fifty-three".