256331230 has 32 divisors (see below), whose sum is σ = 468024480. Its totient is φ = 101068800.

The previous prime is 256331209. The next prime is 256331263. The reversal of 256331230 is 32133652.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 256331195 and 256331204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388641 + ... + 389299.

It is an arithmetic number, because the mean of its divisors is an integer number (14625765).

Almost surely, 2^256331230 is an apocalyptic number.

256331230 is a deficient number, since it is larger than the sum of its proper divisors (211693250).

256331230 is a wasteful number, since it uses less digits than its factorization.

256331230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 256331230 is about 16010.3475914797. The cubic root of 256331230 is about 635.2341542476.

Adding to 256331230 its reverse (32133652), we get a palindrome (288464882).

The spelling of 256331230 in words is "two hundred fifty-six million, three hundred thirty-one thousand, two hundred thirty".