256304031 has 8 divisors (see below), whose sum is σ = 341887104. Its totient is φ = 170795160.

The previous prime is 256304023. The next prime is 256304033. The reversal of 256304031 is 130403652.

It is a happy number.

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

It is not a de Polignac number, because 256304031 - 2³ = 256304023 is a prime.

It is a super-2 number, since 2×256304031² = 131383512613697922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256303992 and 256304010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256304033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9915 + ... + 24716.

It is an arithmetic number, because the mean of its divisors is an integer number (42735888).

Almost surely, 2^256304031 is an apocalyptic number.

256304031 is a deficient number, since it is larger than the sum of its proper divisors (85583073).

256304031 is a wasteful number, since it uses less digits than its factorization.

256304031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37101.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 256304031 is about 16009.4981495361. The cubic root of 256304031 is about 635.2116854742.

Adding to 256304031 its reverse (130403652), we get a palindrome (386707683).

The spelling of 256304031 in words is "two hundred fifty-six million, three hundred four thousand, thirty-one".