256373225 has 12 divisors (see below), whose sum is σ = 318378060. Its totient is φ = 204792000.

The previous prime is 256373197. The next prime is 256373303. The reversal of 256373225 is 522373652.

It can be written as a sum of positive squares in 6 ways, for example, as 3308761 + 253064464 = 1819^2 + 15908^2 .

It is not a de Polignac number, because 256373225 - 2²⁴ = 239596009 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10211 + ... + 24839.

It is an arithmetic number, because the mean of its divisors is an integer number (26531505).

Almost surely, 2^256373225 is an apocalyptic number.

256373225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256373225 is a deficient number, since it is larger than the sum of its proper divisors (62004835).

256373225 is a wasteful number, since it uses less digits than its factorization.

256373225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15340 (or 15335 counting only the distinct ones).

The product of its digits is 75600, while the sum is 35.

The square root of 256373225 is about 16011.6590333419. The cubic root of 256373225 is about 635.2688427008.

The spelling of 256373225 in words is "two hundred fifty-six million, three hundred seventy-three thousand, two hundred twenty-five".