256555030 has 8 divisors (see below), whose sum is σ = 461799072. Its totient is φ = 102622008.

The previous prime is 256555027. The next prime is 256555063. The reversal of 256555030 is 30555652.

256555030 is digitally balanced in base 2 and base 3, because in such bases 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 a junction number, because it is equal to n+sod(n) for n = 256554983 and 256555001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12827742 + ... + 12827761.

It is an arithmetic number, because the mean of its divisors is an integer number (57724884).

Almost surely, 2^256555030 is an apocalyptic number.

256555030 is a deficient number, since it is larger than the sum of its proper divisors (205244042).

256555030 is a wasteful number, since it uses less digits than its factorization.

256555030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25655510.

The product of its (nonzero) digits is 22500, while the sum is 31.

The square root of 256555030 is about 16017.3352964842. The cubic root of 256555030 is about 635.4189724733.

The spelling of 256555030 in words is "two hundred fifty-six million, five hundred fifty-five thousand, thirty".