256004231 has 16 divisors (see below), whose sum is σ = 303175680. Its totient is φ = 211537440.

The previous prime is 256004219. The next prime is 256004279. The reversal of 256004231 is 132400652.

It is a cyclic number.

It is not a de Polignac number, because 256004231 - 2²⁶ = 188895367 is a prime.

It is a super-2 number, since 2×256004231² = 131076332579802722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256004197 and 256004206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256004731) 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, 57980 + ... + 62238.

It is an arithmetic number, because the mean of its divisors is an integer number (18948480).

Almost surely, 2^256004231 is an apocalyptic number.

256004231 is a deficient number, since it is larger than the sum of its proper divisors (47171449).

256004231 is a wasteful number, since it uses less digits than its factorization.

256004231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4574.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 256004231 is about 16000.1322182037. The cubic root of 256004231 is about 634.9639188377.

Adding to 256004231 its reverse (132400652), we get a palindrome (388404883).

The spelling of 256004231 in words is "two hundred fifty-six million, four thousand, two hundred thirty-one".