256425315 has 16 divisors (see below), whose sum is σ = 410572800. Its totient is φ = 136662752.

The previous prime is 256425313. The next prime is 256425343. The reversal of 256425315 is 513524652.

It is a cyclic number.

It is not a de Polignac number, because 256425315 - 2¹ = 256425313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256425313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19006 + ... + 29564.

It is an arithmetic number, because the mean of its divisors is an integer number (25660800).

Almost surely, 2^256425315 is an apocalyptic number.

256425315 is a deficient number, since it is larger than the sum of its proper divisors (154147485).

256425315 is a wasteful number, since it uses less digits than its factorization.

256425315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12186.

The product of its digits is 36000, while the sum is 33.

The square root of 256425315 is about 16013.2855779194. The cubic root of 256425315 is about 635.3118645011.

Adding to 256425315 its reverse (513524652), we get a palindrome (769949967).

The spelling of 256425315 in words is "two hundred fifty-six million, four hundred twenty-five thousand, three hundred fifteen".