256528803 has 8 divisors (see below), whose sum is σ = 342942400. Its totient is φ = 170567208.

The previous prime is 256528799. The next prime is 256528817. The reversal of 256528803 is 308825652.

256528803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256528803 - 2² = 256528799 is a prime.

It is a super-2 number, since 2×256528803² = 131614053537225618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256528843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111673 + ... + 113946.

It is an arithmetic number, because the mean of its divisors is an integer number (42867800).

Almost surely, 2^256528803 is an apocalyptic number.

256528803 is a deficient number, since it is larger than the sum of its proper divisors (86413597).

256528803 is a wasteful number, since it uses less digits than its factorization.

256528803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226001.

The product of its (nonzero) digits is 115200, while the sum is 39.

The square root of 256528803 is about 16016.5165688423. The cubic root of 256528803 is about 635.3973192874.

The spelling of 256528803 in words is "two hundred fifty-six million, five hundred twenty-eight thousand, eight hundred three".