256021230 has 16 divisors (see below), whose sum is σ = 614451024. Its totient is φ = 68272320.

The previous prime is 256021223. The next prime is 256021231. The reversal of 256021230 is 32120652.

It is a junction number, because it is equal to n+sod(n) for n = 256021197 and 256021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256021231) 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, 4266991 + ... + 4267050.

It is an arithmetic number, because the mean of its divisors is an integer number (38403189).

Almost surely, 2^256021230 is an apocalyptic number.

256021230 is an abundant number, since it is smaller than the sum of its proper divisors (358429794).

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

256021230 is a wasteful number, since it uses less digits than its factorization.

256021230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8534051.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 256021230 is about 16000.6634237459. The cubic root of 256021230 is about 634.9779726585.

Adding to 256021230 its reverse (32120652), we get a palindrome (288141882).

The spelling of 256021230 in words is "two hundred fifty-six million, twenty-one thousand, two hundred thirty".