256916441 has 4 divisors (see below), whose sum is σ = 256956084. Its totient is φ = 256876800.

The previous prime is 256916381. The next prime is 256916447. The reversal of 256916441 is 144619652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48720400 + 208196041 = 6980^2 + 14429^2 .

It is a cyclic number.

It is not a de Polignac number, because 256916441 - 2⁶ = 256916377 is a prime.

It is a super-2 number, since 2×256916441² = 132012115312212962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256916395 and 256916404.

It is not an unprimeable number, because it can be changed into a prime (256916447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7580 + ... + 23901.

It is an arithmetic number, because the mean of its divisors is an integer number (64239021).

Almost surely, 2^256916441 is an apocalyptic number.

It is an amenable number.

256916441 is a deficient number, since it is larger than the sum of its proper divisors (39643).

256916441 is an equidigital number, since it uses as much as digits as its factorization.

256916441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39642.

The product of its digits is 51840, while the sum is 38.

The square root of 256916441 is about 16028.6131964060. The cubic root of 256916441 is about 635.7172056376.

The spelling of 256916441 in words is "two hundred fifty-six million, nine hundred sixteen thousand, four hundred forty-one".