256345115225 has 24 divisors (see below), whose sum is σ = 336937639968. Its totient is φ = 192799699200.

The previous prime is 256345115219. The next prime is 256345115227. The reversal of 256345115225 is 522511543652.

It is not a de Polignac number, because 256345115225 - 2¹² = 256345111129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256345115227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52970 + ... + 717980.

It is an arithmetic number, because the mean of its divisors is an integer number (14039068332).

Almost surely, 2^256345115225 is an apocalyptic number.

256345115225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

256345115225 is a deficient number, since it is larger than the sum of its proper divisors (80592524743).

256345115225 is a wasteful number, since it uses less digits than its factorization.

256345115225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665945 (or 665940 counting only the distinct ones).

The product of its digits is 360000, while the sum is 41.

Adding to 256345115225 its reverse (522511543652), we get a palindrome (778856658877).

The spelling of 256345115225 in words is "two hundred fifty-six billion, three hundred forty-five million, one hundred fifteen thousand, two hundred twenty-five".