256203361 has 4 divisors (see below), whose sum is σ = 257900224. Its totient is φ = 254506500.

The previous prime is 256203359. The next prime is 256203373. The reversal of 256203361 is 163302652.

256203361 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.

It is a cyclic number.

It is not a de Polignac number, because 256203361 - 2¹ = 256203359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256203161) 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, 848205 + ... + 848506.

It is an arithmetic number, because the mean of its divisors is an integer number (64475056).

Almost surely, 2^256203361 is an apocalyptic number.

It is an amenable number.

256203361 is a deficient number, since it is larger than the sum of its proper divisors (1696863).

256203361 is a wasteful number, since it uses less digits than its factorization.

256203361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696862.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 256203361 is about 16006.3537696753. The cubic root of 256203361 is about 635.1285093413.

The spelling of 256203361 in words is "two hundred fifty-six million, two hundred three thousand, three hundred sixty-one".