256051506 has 16 divisors (see below), whose sum is σ = 528622848. Its totient is φ = 82597200.

The previous prime is 256051423. The next prime is 256051517. The reversal of 256051506 is 605150652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 688125 + ... + 688496.

It is an arithmetic number, because the mean of its divisors is an integer number (33038928).

Almost surely, 2^256051506 is an apocalyptic number.

256051506 is an abundant number, since it is smaller than the sum of its proper divisors (272571342).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256051506 is a wasteful number, since it uses less digits than its factorization.

256051506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376657.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 256051506 is about 16001.6094815490. The cubic root of 256051506 is about 635.0030016185.

The spelling of 256051506 in words is "two hundred fifty-six million, fifty-one thousand, five hundred six".