256108603 has 4 divisors (see below), whose sum is σ = 257129208. Its totient is φ = 255088000.

The previous prime is 256108597. The next prime is 256108637. The reversal of 256108603 is 306801652.

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

It is a cyclic number.

It is not a de Polignac number, because 256108603 - 2⁵ = 256108571 is a prime.

It is a super-2 number, since 2×256108603² = 131183233061223218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256108693) 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, 509926 + ... + 510427.

It is an arithmetic number, because the mean of its divisors is an integer number (64282302).

Almost surely, 2^256108603 is an apocalyptic number.

256108603 is a deficient number, since it is larger than the sum of its proper divisors (1020605).

256108603 is a wasteful number, since it uses less digits than its factorization.

256108603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020604.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 256108603 is about 16003.3934838833. The cubic root of 256108603 is about 635.0501979454.

The spelling of 256108603 in words is "two hundred fifty-six million, one hundred eight thousand, six hundred three".