256155700 has 36 divisors (see below), whose sum is σ = 569424492. Its totient is φ = 99961600.

The previous prime is 256155671. The next prime is 256155703. The reversal of 256155700 is 7551652.

It can be written as a sum of positive squares in 6 ways, for example, as 80964004 + 175191696 = 8998^2 + 13236^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256155703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27139 + ... + 35338.

It is an arithmetic number, because the mean of its divisors is an integer number (15817347).

Almost surely, 2^256155700 is an apocalyptic number.

256155700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256155700 is an abundant number, since it is smaller than the sum of its proper divisors (313268792).

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

256155700 is a wasteful number, since it uses less digits than its factorization.

256155700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62532 (or 62525 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 256155700 is about 16004.8648854028. The cubic root of 256155700 is about 635.0891230025.

The spelling of 256155700 in words is "two hundred fifty-six million, one hundred fifty-five thousand, seven hundred".