256227145 has 16 divisors (see below), whose sum is σ = 330902928. Its totient is φ = 189757440.

The previous prime is 256227137. The next prime is 256227157. The reversal of 256227145 is 541722652.

It can be written as a sum of positive squares in 8 ways, for example, as 898704 + 255328441 = 948^2 + 15979^2 .

It is not a de Polignac number, because 256227145 - 2³ = 256227137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256227145.

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, 19524 + ... + 29893.

It is an arithmetic number, because the mean of its divisors is an integer number (20681433).

Almost surely, 2^256227145 is an apocalyptic number.

It is an amenable number.

256227145 is a deficient number, since it is larger than the sum of its proper divisors (74675783).

256227145 is a wasteful number, since it uses less digits than its factorization.

256227145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49500.

The product of its digits is 33600, while the sum is 34.

The square root of 256227145 is about 16007.0967073983. The cubic root of 256227145 is about 635.1481622569.

Adding to 256227145 its reverse (541722652), we get a palindrome (797949797).

The spelling of 256227145 in words is "two hundred fifty-six million, two hundred twenty-seven thousand, one hundred forty-five".