256315134 has 8 divisors (see below), whose sum is σ = 512630280. Its totient is φ = 85438376.

The previous prime is 256315109. The next prime is 256315139. The reversal of 256315134 is 431513652.

It is a sphenic number, since it is the product of 3 distinct primes.

256315134 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256315139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21359589 + ... + 21359600.

It is an arithmetic number, because the mean of its divisors is an integer number (64078785).

Almost surely, 2^256315134 is an apocalyptic number.

256315134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256315134 is a wasteful number, since it uses less digits than its factorization.

256315134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42719194.

The product of its digits is 10800, while the sum is 30.

The square root of 256315134 is about 16009.8449086804. The cubic root of 256315134 is about 635.2208577237.

Adding to 256315134 its reverse (431513652), we get a palindrome (687828786).

The spelling of 256315134 in words is "two hundred fifty-six million, three hundred fifteen thousand, one hundred thirty-four".