256315205 has 32 divisors (see below), whose sum is σ = 337042944. Its totient is φ = 186366976.

The previous prime is 256315201. The next prime is 256315211. The reversal of 256315205 is 502513652.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 256315205 - 2² = 256315201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256315201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 331199 + ... + 331971.

It is an arithmetic number, because the mean of its divisors is an integer number (10532592).

Almost surely, 2^256315205 is an apocalyptic number.

It is an amenable number.

256315205 is a deficient number, since it is larger than the sum of its proper divisors (80727739).

256315205 is a wasteful number, since it uses less digits than its factorization.

256315205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 256315205 is about 16009.8471260659. The cubic root of 256315205 is about 635.2209163763.

Adding to 256315205 its reverse (502513652), we get a palindrome (758828857).

The spelling of 256315205 in words is "two hundred fifty-six million, three hundred fifteen thousand, two hundred five".