256434503 has 4 divisors (see below), whose sum is σ = 276160248. Its totient is φ = 236708760.

The previous prime is 256434481. The next prime is 256434517. The reversal of 256434503 is 305434652.

256434503 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.

It is a cyclic number.

It is not a de Polignac number, because 256434503 - 2¹² = 256430407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256434503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256434523) 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, 9862853 + ... + 9862878.

It is an arithmetic number, because the mean of its divisors is an integer number (69040062).

Almost surely, 2^256434503 is an apocalyptic number.

256434503 is a deficient number, since it is larger than the sum of its proper divisors (19725745).

256434503 is a wasteful number, since it uses less digits than its factorization.

256434503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19725744.

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 256434503 is about 16013.5724621335. The cubic root of 256434503 is about 635.3194523839.

The spelling of 256434503 in words is "two hundred fifty-six million, four hundred thirty-four thousand, five hundred three".