256015100 has 36 divisors (see below), whose sum is σ = 606060168. Its totient is φ = 93096000.

The previous prime is 256015091. The next prime is 256015117. The reversal of 256015100 is 1510652.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115271 + ... + 117470.

Almost surely, 2^256015100 is an apocalyptic number.

256015100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256015100 is an abundant number, since it is smaller than the sum of its proper divisors (350045068).

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

256015100 is a wasteful number, since it uses less digits than its factorization.

256015100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232766 (or 232759 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 256015100 is about 16000.4718680419. The cubic root of 256015100 is about 634.9729047897.

Adding to 256015100 its reverse (1510652), we get a palindrome (257525752).

The spelling of 256015100 in words is "two hundred fifty-six million, fifteen thousand, one hundred".