256916245 has 16 divisors (see below), whose sum is σ = 311675760. Its totient is φ = 203295744.

The previous prime is 256916239. The next prime is 256916329. The reversal of 256916245 is 542619652.

256916245 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 8 ways, for example, as 130713489 + 126202756 = 11433^2 + 11234^2 .

It is a cyclic number.

It is not a de Polignac number, because 256916245 - 2¹³ = 256908053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 256916198 and 256916207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197437 + ... + 198733.

It is an arithmetic number, because the mean of its divisors is an integer number (19479735).

Almost surely, 2^256916245 is an apocalyptic number.

It is an amenable number.

256916245 is a deficient number, since it is larger than the sum of its proper divisors (54759515).

256916245 is a wasteful number, since it uses less digits than its factorization.

256916245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704.

The product of its digits is 129600, while the sum is 40.

The square root of 256916245 is about 16028.6070823388. The cubic root of 256916245 is about 635.7170439760.

The spelling of 256916245 in words is "two hundred fifty-six million, nine hundred sixteen thousand, two hundred forty-five".