256019101 has 8 divisors (see below), whose sum is σ = 277565400. Its totient is φ = 234737472.

The previous prime is 256019089. The next prime is 256019107. The reversal of 256019101 is 101910652.

256019101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4955076 + 251064025 = 2226^2 + 15845^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256019101 - 2¹¹ = 256017053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256019107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64150 + ... + 68023.

It is an arithmetic number, because the mean of its divisors is an integer number (34695675).

Almost surely, 2^256019101 is an apocalyptic number.

It is an amenable number.

256019101 is a deficient number, since it is larger than the sum of its proper divisors (21546299).

256019101 is a wasteful number, since it uses less digits than its factorization.

256019101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132335.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 256019101 is about 16000.5968951161. The cubic root of 256019101 is about 634.9762125547.

Adding to 256019101 its reverse (101910652), we get a palindrome (357929753).

The spelling of 256019101 in words is "two hundred fifty-six million, nineteen thousand, one hundred one".